Editor's Choice - Our Favorite Hydor Aquarium Water Treatments

1. Hydor Prodibio Cure Aquarium Medication Worms and Parasites for Freshwater 6 Vial USA USA

User Ratings: 88

Hydor PRO-00621 First Impressions

"It's CLEAR!"

Initially this was used as a sample packet came with our aquarium. If you have a freshwater fish tank, I highly recommend this product. I have two goldfish and a Corydoras catfish. This is my go to water conditioner and stressed fish treatment. The chloramines contain a small amount of ammonia. It has been 4 days and our beta is loving the clearer water. Easy to dispense the product without mess and easy to use per instructions.

  • Hydor Prodibio Cure Aquarium Medication Worms and Parasites for Freshwater 6 Vial USA USA
  • Prodi bio Cure Aquarium Medication, Worms and Parasites for Freshwater
  • At the end of the treatment period, the use of Bio digest Start (included) allows the regeneration of biological filtration, which helps bring the aquarium back to a healthy state
  • Manufactured in France
  • Manufacture: Central Pet Distribution
  • Product Dimensions: 3 x 2.75 x 0.75 inches; 1.28 Ounces
  • Editor's Impressions Of The Hydor PRO-00621
  • Treatment Effectiveness [star rating='5']
  • Quality [star rating='5']
  • Value For Money [star rating='4.5']
  • Affordability [star rating='3.9']

Hydor PRO-00621 Final Thoughts

"Sky high ammonia."

Fish seem healthy and active during use. I love all of the API products, especially their easy to use test kits. I've used every product on the market and this is the most AMAZING MUST HAVE PRODUCT! My water is crystal clear like the first day i filled it and i could be happier. You have to understand when to use this product, and what is is used for. This is my go to water conditioner and stressed fish treatment. I have used this consistently since cycling my small sized fresh-water tank.

Overall Score
4.8

[star rating="4.8"]
(6 Points)

2. API Stress Coat Water Conditioner, Makes tap Water Safe, Replaces fish's Protective Coat Damaged by ...

User Ratings: 86 1

API 603A First Impressions

"So far is going good."

The reviews on people fish dying really spooked me. In my opinion there's nothing better. My water is crystal clear like the first day i filled it and i could be happier. Fish possess an antioxidant defense system to reduce the negative effects of ROS. I was sort of nervous buy this product and trying it out. No exaggeration-- literally cleared overnight. But the septic tank bacteria did nothing.

  • API Stress Coat Water Conditioner, Makes tap Water Safe, Replaces fish's Protective Coat Damaged by handling or Fish Fighting, Use When Adding or Changing Water, Adding Fish and When Fish are Injured
  • Contains one (1) API STRESS COAT 16-ounce, one (1) API STRESS ZYME 16-ounce, and one (1) API TROPICAL FLAKES 1.1-ounce
  • Makes tap water safe and protects fish with dual-action formula
  • API STRESS COAT makes tap water safe and protects fish with dual-action formula
  • API STRESS ZYME consumes sludge to help keep gravel and decorations clean
  • API TROPICAL FLAKES Fish Food contains key nutrients for a complete and balanced diet for all freshwater tropical fish
  • Feed fish 2x daily, use API STRESS ZYME weekly and add API STRESS COAT when changing water at least every 2 weeks or when adding new fish
  • Manufacture: Mars Fishcare
  • Product Dimensions: 7.88 x 2.5 x 8.88 inches; 2 Pounds
  • Editor's Impressions Of The API 603A
  • Treatment Effectiveness [star rating='5']
  • Quality [star rating='4']
  • Value For Money [star rating='4.2']
  • Affordability [star rating='5']

API 603A Final Thoughts

"Then go for it."

Thanks to the Amazon reviewer who mentioned this! I know you are going to want to add more chemicals, etc. Crystal clear after changing water and adding this to my 2. Fish possess an antioxidant defense system to reduce the negative effects of ROS. I'll continue to use this product, especially after a good tank cleaning. I've used every product on the market and this is the most AMAZING MUST HAVE PRODUCT! I decided to pick it up once again and struggled mightily my first few months.

Overall Score
4.8

[star rating="4.8"]
(1183 Points)

3. Seachem 2 Pack of Cuprisorb, 2.1 Ounces Each, Aquarium Water Treatment for Copper and Heavy Metal Re...

Seachem First Impressions

"Awesome stuff."

If either or both ammonia and Nitrite are above 1ppm do not add ammonia. I decided to pick it up once again and struggled mightily my first few months. I decided to pick it up once again and struggled mightily my first few months. If you're treating injured fins or introducing new fish, this is for you. Initially this was used as a sample packet came with our aquarium. 4-5 squirts in a sink of water, soak my suit 10 min, wring out and hang to dry. No observable signs of stress in the fish.

  • Seachem 2 Pack of Cuprisorb, 2.1 Ounces Each, Aquarium Water Treatment for Copper and Heavy Metal Remover
  • 2 2.1-ounce packets CupriSorb
  • Ideal for emergency copper removal in fish tanks
  • CupriSorb aquarium water treatment is a powerful adsorbent of heavy metals
  • Extracts all types of copper from water and, in continuous use, from the aquarium gravel/substrate bed as well
  • CupriSorb will allow maintenance of invertebrates in copper-treated tanks by removing copper leaching from substrates
  • Manufacture: Seachem
  • Product Dimensions: 4.7 x 4.6 x 2.8 inches; 4.94 Ounces
  • Editor's Impressions Of The Seachem
  • Treatment Effectiveness [star rating='4.2']
  • Quality [star rating='5']
  • Value For Money [star rating='4.2']
  • Affordability [star rating='5']

Seachem Final Thoughts

"I highly recommend it."

However if you want a stress coat, this is perfect. In the morning I awoke with my fish at the bottom barely able to move. This is my absolute favorite conditioner I have used for all my aquatic creatures. I do not use this as a product to treat my tap water. 1st day, I put product in tank with Fluval Biological Cleaner for Aquariums also. I love all of the API products, especially their easy to use test kits. I hope I made the right decision, Betty is our family pet and is really loved!

Overall Score
5.0

[star rating="5"]
(5 Points)

4. Tetra Lifeguard All-in-One Treatment, 64-Tablets

User Ratings: 73 3

Tetra 77326 First Impressions

"Suggested buy!"

I know you are going to want to add more chemicals, etc. 1st day, I put product in tank with Fluval Biological Cleaner for Aquariums also. I hope I made the right decision, Betty is our family pet and is really loved! I've used every product on the market and this is the most AMAZING MUST HAVE PRODUCT! I finally gave in and purchased this product. It took a couple of days to clear but it works. I even poured in extra to help with the healing.

  • Tetra Lifeguard All-in-One Treatment, 64-Tablets
  • With Lifeguard Tablets, there is no need for time-consuming guesswork when it comes to treating your freshwater fish. A unique, broad spectrum, non-antibiotic agent, Lifeguard treats the clinical signs of disease at their earliest stages in freshwater fish. Added to aquarium water, the powerful oxidizing action of HaloShield attacks and destroys microorganisms that can cause disease in fish.2-Pack (32 tablets per pack)
  • Use for treating fungus, ick, red streaks, milky or shedding slime, flukes, bacterial gill disease, mouth and fin rot, clamped or torn fins, and ulcers. Lifeguard Tablets may also be used as a preventive when adding new fish. Five day treatment.Effectively treats most common fish diseases
  • Will treat ick, fungus, mouth rot, and more
  • May be used as preventative when adding new fish
  • For all freshwater aquariums
  • Manufacture: Tetra
  • Editor's Impressions Of The Tetra 77326
  • Treatment Effectiveness [star rating='4']
  • Quality [star rating='3.9']
  • Value For Money [star rating='3.6']
  • Affordability [star rating='4.9']

Tetra 77326 Final Thoughts

"Thank you!"

In the morning I awoke with my fish at the bottom barely able to move. If you have new tank syndrome then this is the stuff. I used to use AmQuel years ago and then spent years out of the aquarium hobby. The equation is already done for you if you buy Dr. It gets rid of the chlorine in tap water. My tap water is very heavy and this water conditioner does it's magic. I've used every product on the market and this is the most AMAZING MUST HAVE PRODUCT!

Overall Score
4.5

[star rating="4.5"]
(456 Points)

5. Kordon Methylene Blue-General Disease Prevention Treatment for Aquarium

User Ratings: 76 3

Kordon MODEL-37344 First Impressions

"Of course."

The chloramines contain a small amount of ammonia. This water conditioner is a life saver! I have two goldfish and a Corydoras catfish. You have to understand when to use this product, and what is is used for. 4-5 squirts in a sink of water, soak my suit 10 min, wring out and hang to dry. This allows the conditioner time for its anti-heavy metal ingredients to work fully. Now our fish have grown and we've added live plants.

  • Kordon Methylene Blue-General Disease Prevention Treatment for Aquarium
  • Kordon methylene blue 4oz
  • Methylene blue is effective against superficial fungal infections of fishes
  • The drug may be used as an alternative to malachite green for the control of fungus
  • Manufacture: KORDON LLC
  • Product Dimensions: 0.02 x 0.02 x 0.02 inches; 0.32 Ounces
  • Editor's Impressions Of The Kordon MODEL-37344
  • Treatment Effectiveness [star rating='5']
  • Quality [star rating='4.4']
  • Value For Money [star rating='4.9']
  • Affordability [star rating='3.7']

Kordon MODEL-37344 Final Thoughts

"This product is AMAZING!"

You have to understand when to use this product, and what is is used for. If either or both ammonia and Nitrite are above 1ppm do not add ammonia. He started making bubble nests again which ne never did when it was super cloudy. Boy, I thought I was having trouble with my filter. Don't know if that made a difference but it didn't hurt. The difference is that he was going twice his normal speed. It just hasn't helped with the tint.

Overall Score
4.6

[star rating="4.6"]
(923 Points)

6. GloFish Water Conditioner Makes Tap Water Safe for Aquariums Betta Fish, 2 fl. oz, 2 FZ, Model Numbe...

User Ratings: 77 3

GloFish AQ-78302 First Impressions

"I love Seachem."

I use in a freshwater aquarium and works well. My fish didn't appear negatively effected by it either. Very good product for an unbelievable price. If you're serious about fish keeping, always quarantine and always use Stress Coat! I tried it without the water change and really didn't make a difference. The reviews on people fish dying really spooked me. Makes me want to get more aquarium's, lol.

  • GloFish Water Conditioner Makes Tap Water Safe for Aquariums Betta Fish, 2 fl. oz, 2 FZ, Model Number: AQ-78302
  • WATER CONDITIONER: Makes tap water safe for GloFish Bettas
  • PROMOTES HEALTH: Removes harmful chlorine, chloramines and heavy metals found in tap water
  • HELPS REDUCE STRESS: Allows your GloFish Betta to thrive and display full coloration
  • MAKES TAP WATER SAFE: Use when setting up a new aquarium, with partial water changes or evaporation replacement
  • BRINGING COLOR TO LIFE: GloFish fluorescent fish and products create a complete underwater fluorescent experience
  • Manufacture: GloFish
  • Item Weight: 3.1 ounces
  • Product Dimensions: 1.44 x 1.44 x 4.13 inches
  • Editor's Impressions Of The GloFish AQ-78302
  • Treatment Effectiveness [star rating='4.6']
  • Quality [star rating='5']
  • Value For Money [star rating='3.8']
  • Affordability [star rating='4.8']

GloFish AQ-78302 Final Thoughts

"Then I added pristine."

He started making bubble nests again which ne never did when it was super cloudy. Beats the heck out of those expensive suit cleaners. The top is a measuring tool as well which I was not expecting. Sure enough they are back to their healthy coloration and didn't end up dying on me. If you have a freshwater fish tank, I highly recommend this product. I know you are going to want to add more chemicals, etc. In my opinion there's nothing better.

Overall Score
4.6

[star rating="4.6"]
(43 Points)

7. Algone Aquarium Water Clarifier and Nitrate Remover, Large

User Ratings: 62 6

Algone 1002 First Impressions

"My fish kept dying."

The equation is already done for you if you buy Dr. Thanks to the Amazon reviewer who mentioned this! The aquasafe water conditioner is a fantastic de-chlorinator. I'm sold on this, I've tried SO MANY and wow. I read another review for this product saying they were using API for this purpose. The afternoon I received this product I added half a dose to each aquarium. This allows the conditioner time for its anti-heavy metal ingredients to work fully.

  • Algone Aquarium Water Clarifier and Nitrate Remover, Large
  • Creates crystal-clear water
  • Safe for aquatic plants
  • Clears cloudy water
  • Clears green water
  • Treats 1200 gallons
  • Manufacture: Algone
  • Product Dimensions: 5.6 x 4 x 2.9 inches; 4.8 Ounces
  • Editor's Impressions Of The Algone 1002
  • Treatment Effectiveness [star rating='3.9']
  • Quality [star rating='4.3']
  • Value For Money [star rating='4.6']
  • Affordability [star rating='4.3']

Algone 1002 Final Thoughts

"No argument from me."

You need a source of ammonia to feed the bacteria which Dr. This product is exactly what it says it is. This is definitely worth trying if you have cloudy water. Crystal clear after changing water and adding this to my 2. I've used API water conditioner before and it works well. It just hasn't helped with the tint. I have had aquariums for 40 years and have always used their product Cycle.

Overall Score
4.2

[star rating="4.2"]
(195 Points)

8. Fitz Aquatics Fritz pH Lower for Fresh and Salt Water Aquariums

User Ratings: 61 10

Fritz Aquatics 80355 First Impressions

"00 ppm on both tests!"

It took a couple of days to clear but it works. Ever since I made this purchase, my fish are not dying at all. But the septic tank bacteria did nothing. I like API products and this is no different. I use mine for my beta fish in a 2 gallon tank and need less than a half a cap full. The afternoon I received this product I added half a dose to each aquarium. Crystal clear after changing water and adding this to my 2.

  • Fitz Aquatics Fritz pH Lower for Fresh and Salt Water Aquariums
  • Easily Lower the pH Levels in Aquariums
  • Increases Acidity
  • Reduces Alkalinity
  • Correct pH Improves Biological Filter Efficiency
  • For Use in Fresh Water and Salt Water Aquariums
  • Age range description: All Life Stages
  • Manufacture: Fritz Aquatics
  • Product Dimensions: 4.9 x 1.68 x 1.68 inches; 6.4 Ounces
  • Editor's Impressions Of The Fritz Aquatics 80355
  • Treatment Effectiveness [star rating='4.2']
  • Quality [star rating='3.9']
  • Value For Money [star rating='4.5']
  • Affordability [star rating='3.5']

Fritz Aquatics 80355 Final Thoughts

"This stuff really works."

My water is crystal clear again, and it smells like a healthy fish tank again. Do not clean the filters, do not change the filters. I've had my fishy for 5 years now and I would say it's ALL because of Fluval. If you're treating injured fins or introducing new fish, this is for you. UV light works on it but not much else. I do not use this as a product to treat my tap water. Fish would die occassionally every few weeks or so.

Overall Score
4.2

[star rating="4.2"]
(152 Points)

9. MarineLand BIO-Spira Freshwater Bacteria for Aquariums, 3.38-Ounce

User Ratings: 71 9

MarineLand ML90762-00 First Impressions

"Thank you!"

Easy to dispense the product without mess and easy to use per instructions. She seems ok with it she is behaving like herself. I'll continue to use this product, especially after a good tank cleaning. Use a water conditioner that does not remove ammonia. My fish didn't appear negatively effected by it either. 1st day, I put product in tank with Fluval Biological Cleaner for Aquariums also. I wanted to see if it would take the chlorine out of my swimsuit.

  • MarineLand BIO-Spira Freshwater Bacteria for Aquariums, 3.38-Ounce
  • Advanced nitrifies instantly remove harmful ammonia and nitrite
  • Includes sludge cleaning bacteria for a clear, healthy aquarium
  • Prevents new tank syndrome
  • Treats 100 gallons
  • Manufacture: Tetra
  • Product Dimensions: 4 x 1.38 x 5 inches; 4 Ounces
  • Editor's Impressions Of The MarineLand ML90762-00
  • Treatment Effectiveness [star rating='4.1']
  • Quality [star rating='4.7']
  • Value For Money [star rating='3.5']
  • Affordability [star rating='3.8']

MarineLand ML90762-00 Final Thoughts

"Pet Smart knows nothing."

You need to buy an eye dropper for this. She seems ok with it she is behaving like herself. I have two 36 gallon tanks right now. I decided to pick it up once again and struggled mightily my first few months. I know you are going to want to add more chemicals, etc. No exaggeration-- literally cleared overnight. The equation is already done for you if you buy Dr.

Overall Score
4.3

[star rating="4.3"]
(98 Points)

10. Dr. Tim’s Aquatics Ammonium Chloride Aquarium Treatment for Fishless Cycling – Chlorine Free, Fi...

User Ratings: 77 3

DrTim's Aquatics 831 First Impressions

"Highly recommended."

It gets rid of the chlorine in tap water. Sure enough they are back to their healthy coloration and didn't end up dying on me. My water is crystal clear again, and it smells like a healthy fish tank again. I read the reviews, and decided to give this a try. Dunkin, my Betta doesn't seem to stress out over my adding this. I finally gave in and purchased this product. It took a couple of days to clear but it works.

  • Dr. Tim’s Aquatics Ammonium Chloride Aquarium Treatment for Fishless Cycling – Chlorine Free, Fish Tank Cleaner for Saltwater, Freshwater, Reef Aquariums – 100% Natural – 4 Oz.
  • FISHLESS CYCLING AQUARIUM CLEANING TREATMENT: The ammonium chloride solution from DrTim’s Aquatics offers a chlorine-free method for sanitizing new aquaria or when cycling water when fish or coral are not present. This powerful solution makes fishless cycling mess free.
  • REMOVES HARMFUL TOXINS FROM SALTWATER FISH TANKS: Even with regular water changes and maintenance, aquariums and fish tanks produces bad bacteria and it can take up to 30 days to eliminate waste. When using this ammonium chloride solution for fishless cycling with DrTim’s Aquatics One & Only, you can instantly create a bio filter to remove nitrite and toxic ammonia naturally.
  • 100% NATURAL, ECO-FRIENDLY FISH TANK CLEANER: There’s no need to wait when treating your new saltwater aquarium or freshwater fish tank with this ammonium chloride solution and One & Only from DrTim’s Aquatics. This fish tank cleaner eliminates new tank syndrome and does not include sulfur or other offensive odors.
  • AQUARIUM SUPPLIES YOU NEED: Offer your pet fish and corals an environment in which they can thrive with this ammonium chloride solution that cleans with just four drops per gallon. Ammonium chloride from DrTim’s Aquatics is available in 2 and 4 ounce sizes.
  • HIGH-QUALITY AQUARIUM PRODUCTS: DrTim’s Aquatics offers an expansive line of aquarium products used by professionals and residential customers. Based on years of experience in marine biology, DrTim’s Aquatics’ products utilize his vast knowledge and are backed by scientific evidence and innovative research.
  • Manufacture: DrTim's Aquatics, LLC
  • Product Dimensions: 1.8 x 1.8 x 5 inches; 4.8 Ounces
  • Editor's Impressions Of The DrTim's Aquatics 831
  • Treatment Effectiveness [star rating='3.8']
  • Quality [star rating='5']
  • Value For Money [star rating='4.9']
  • Affordability [star rating='3.8']

DrTim's Aquatics 831 Final Thoughts

"I LOVE this product."

One planted that has algae problem so bad. It's a must for anyone who loves Goldfish. This water conditioner is a life saver! The reviews on people fish dying really spooked me. Initially this was used as a sample packet came with our aquarium. By the following morning, the water was clear of algae. This worked really well for my tank.

Overall Score
4.6

[star rating="4.6"]
(133 Points)

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