Editor's Choice - Our Favorite Fluval Aquarium Water Treatments
1. Fluval Water Conditioner for Aquariums, 16.9-Ounce
User Ratings: 79 2
Fluval A8344A1 First Impressions
"This product is amazing."I hope I made the right decision, Betty is our family pet and is really loved! It's water change day so I did this step first then started cleaning the tank. I like API products and this is no different. Thanks to the Amazon reviewer who mentioned this! I swim 5x week and usually my suits last about 2 months. The bottle will last me years as it is huge! I have a great pump and uv light but still had cloudy-ish water.
- Fluval Water Conditioner for Aquariums, 16.9-Ounce
- Makes tap water safe for fish
- Neutralizes chlorine, chloramines and heavy metals
- Protects the sensitive mucous membrane of the fish
- Patented stress reducing formula
- For fresh and saltwater use
- Adding new water
- Water changes
- Setting up new tanks
- Manufacture: Fluval
- Product Dimensions: 3 x 3 x 6.5 inches; 1.08 Pounds
- Editor's Impressions Of The Fluval A8344A1
- Treatment Effectiveness [star rating='3.7']
- Quality [star rating='4.2']
- Value For Money [star rating='4.7']
- Affordability [star rating='4.6']
Fluval A8344A1 Final Thoughts
"This a great deal."My water was cloudy with a very fine misty haze. Now our fish have grown and we've added live plants. He started making bubble nests again which ne never did when it was super cloudy. By the following morning, the water was clear of algae. He started making bubble nests again which ne never did when it was super cloudy. This water conditioner is a life saver! In the last two months I have seen this product work its gold.
Overall Score
4.7
(1513 Points)

Peoples Choice - Other Highly Rated Fluval Aquarium Water Treatments
2. Fluval Biological Enhancer for Aquariums, 16.9-Ounce
User Ratings: 80 3
Fluval A8351A1 First Impressions
"Wonderful product."It's water change day so I did this step first then started cleaning the tank. You need to buy an eye dropper for this. If you have new tank syndrome then this is the stuff. From their own colon or a hole in the ground. The bottle will last me years as it is huge! Very good product for an unbelievable price. We use it when we clean& change out water.
- Fluval Biological Enhancer for Aquariums, 16.9-Ounce
- Immediately establishes safe biological aquarium environment
- Powerful responsive ammonia and nitrite elimination
- Prevents fish loss
- Allows immediate introduction of fish
- For Fresh and Saltwater Use
- All-natural water care – creates a safe biological habitat to prevent fish loss
- Infused with a powerful team of beneficial bacteria that immediately inoculates aquarium water
- Extremely effective when setting up a new aquarium or introducing new fish to an existing one
- Manufacture: Fluval
- Product Dimensions: 3 x 3 x 6.5 inches; 1.15 Pounds
- Editor's Impressions Of The Fluval A8351A1
- Treatment Effectiveness [star rating='5']
- Quality [star rating='5']
- Value For Money [star rating='4.8']
- Affordability [star rating='4.2']
Fluval A8351A1 Final Thoughts
"I was getting 30-40 ppm."I swim 5x week and usually my suits last about 2 months. It is just as good when compared to other brands of conditioner. I have a Fluval tank and only use their chemicals. It's water change day so I did this step first then started cleaning the tank. I could see it working immediately which was pretty wild. However, be aware that the dosage starts at 20 gallons. My water is crystal clear again, and it smells like a healthy fish tank again.
Overall Score
4.7
(1263 Points)

3. Fluval Biological Enhancer for Aquarium, 8.4-Ounce
User Ratings: 81 2
Fluval A8349 First Impressions
"I was getting 30-40 ppm."Don't know if that made a difference but it didn't hurt. Just an idea incase someone doesn't have a spare dropper. I have been battling cloudy water in our small aquarium for two months. I've used it for years with great results. The chloramines contain a small amount of ammonia. Pictures included to see the difference. I have been using API on his suits for 3 weeks now and so far so good.
- Fluval Biological Enhancer for Aquarium, 8.4-Ounce
- Powerful team of beneficial bacteria immediately inoculates aquarium water
- Creates a safe biological habitat for your fish
- Eliminates ammonia and nitrite
- Will not harm plants; animals or humans
- Size: 8.4 oz.
- Prevents loss of fish
- All-natural product
- Bio-floc technology ensures product stability, efficacy and shelf life
- Manufacture: Fluval
- Product Dimensions: 2.3 x 2.3 x 6 inches; 2.4 Ounces
- Editor's Impressions Of The Fluval A8349
- Treatment Effectiveness [star rating='4.5']
- Quality [star rating='4.6']
- Value For Money [star rating='4.7']
- Affordability [star rating='4.1']
Fluval A8349 Final Thoughts
"They eat and poop a lot."I swim 5x week and usually my suits last about 2 months. Yes I know, they aren't supposed to live that long and no I can't prove it. API Stress Coat is a phenomenal product. I like API products and this is no different. This is the 5th since I put in the product and my tank is crystal clear. I finally gave in and purchased this product. I have a Fluval tank and only use their chemicals.
Overall Score
4.7
(967 Points)

4. Fluval Quick Clear for Aquarium Water Treatment
User Ratings: 71 6
Fluval A8366 First Impressions
"Does work well!"I have two goldfish and a Corydoras catfish. 1st day, I put product in tank with Fluval Biological Cleaner for Aquariums also. Don't know if that made a difference but it didn't hurt. If you have a freshwater fish tank, I highly recommend this product. Do not gravel vac or disturb the substrate. Use a heater and crank it to 82 degrees again without fish in the tank. I've used every product on the market and this is the most AMAZING MUST HAVE PRODUCT!
- Fluval Quick Clear for Aquarium Water Treatment
- Water Clarifier for freshwater aquariums
- Traps floating particles
- Safe for all aquarium inhabitants
- 4 fluid ounces
- Manufacture: Fluval
- Product Dimensions: 1.8 x 1.8 x 5 inches; 3.17 Ounces
- Editor's Impressions Of The Fluval A8366
- Treatment Effectiveness [star rating='5']
- Quality [star rating='4.6']
- Value For Money [star rating='4.6']
- Affordability [star rating='3.5']
Fluval A8366 Final Thoughts
"I have guppies."I have a Fluval tank and only use their chemicals. I love it when a product does what its supposed to. I have a 5 gallon tank, so that number was waaaay too high for me. Boy, I thought I was having trouble with my filter. Fish seem healthy and active during use. It is just as good when compared to other brands of conditioner. The aquasafe water conditioner is a fantastic de-chlorinator.
Overall Score
4.4
(766 Points)

Honorable Mentions - More Top Selling Fluval Aquarium Water Treatments
5. Fluval Clarify Bio for Aquarium Water Treatment
User Ratings: 68 5
Fluval First Impressions
"Then go for it."No exaggeration-- literally cleared overnight. During cycling you will be using often. Fish possess an antioxidant defense system to reduce the negative effects of ROS. In the morning I awoke with my fish at the bottom barely able to move. This is only temporary till I get a spare dropper. However if you want a stress coat, this is perfect. If you're serious about fish keeping, always quarantine and always use Stress Coat!
- Fluval Clarify Bio for Aquarium Water Treatment
- 2-Count (Two 4 oz Bottles)
- Bio Clear is recommended for clarifying cloudy water caused by new tank syndrome, excess food, organic waste and decaying plant material
- Safe for all aquarium inhabitants
- For freshwater use only
- Made in Canada
- Manufacture: Fluval
- Editor's Impressions Of The Fluval
- Treatment Effectiveness [star rating='3.5']
- Quality [star rating='4.2']
- Value For Money [star rating='5']
- Affordability [star rating='4.7']
Fluval Final Thoughts
"They eat and poop a lot."Dealing with biological cloudiness in my tank for some time. I like that it's a large bottle with multiple uses, so that's nice. It is much safer to simply to add 3 drops per gallon. I've used it for years with great results. 2nd day kinda noticed a slight change in water. I didn't purchase this for an aquarium. She seems ok with it she is behaving like herself.
Overall Score
4.4
(377 Points)

6. Fluval Water Conditioner for Aquariums, 2.1-Quart
User Ratings: 89 2
Fluval A8345A2 First Impressions
"Still no big changes."You need to buy an eye dropper for this. Easy to dispense the product without mess and easy to use per instructions. 4-5 squirts in a sink of water, soak my suit 10 min, wring out and hang to dry. My water is crystal clear like the first day i filled it and i could be happier. This is the 5th since I put in the product and my tank is crystal clear. If you're treating injured fins or introducing new fish, this is for you. If either or both ammonia and Nitrite are above 1ppm do not add ammonia.
- Fluval Water Conditioner for Aquariums, 2.1-Quart
- Performance driven at affordable prices
- Package Dimensions: 22.86 H x 8.38 L x 17.53 W (centimetres)
- Package Weight: 2.2 kilograms
- Country of Origin : Canada
- Manufacture: Rolf C. Hagen (USA) Corp.
- Product Dimensions: 3.3 x 6.9 x 9 inches; 4.8 Pounds
- Editor's Impressions Of The Fluval A8345A2
- Treatment Effectiveness [star rating='5']
- Quality [star rating='5']
- Value For Money [star rating='5']
- Affordability [star rating='3.9']
Fluval A8345A2 Final Thoughts
"They eat and poop a lot."Beats the heck out of those expensive suit cleaners. I recieved it today at 3pm and applied it around 4pm. I've used it for years with great results. It gets rid of the chlorine in tap water. I decant this to a small 5 oz squeeze bottle and leave the rest in the fridge. DON'T just wait everything will be fine. I've always had a love for fish and had a few tanks when I was younger.
Overall Score
4.8
(207 Points)

7. Fluval Water Conditioner for Aquarium, 8.4-Ounce
User Ratings: 80 2
Fluval A8343 First Impressions
"Would I buy this again."My fish didn't appear negatively effected by it either. I have two goldfish and a Corydoras catfish. I've always had a love for fish and had a few tanks when I was younger. I'm sold on this, I've tried SO MANY and wow. I have a 5 gallon tank, so that number was waaaay too high for me. I'm hoping this one works out if not I'm sticking to the one I used before. Beats the heck out of those expensive suit cleaners.
- Fluval Water Conditioner for Aquarium, 8.4-Ounce
- Complete tap water conditioner
- Improves aquatic environments for tropical fish
- Reduces Stress for Fish
- Coats and protects scales and fins
- Size: 8.4 oz.
- Manufacture: Fluval
- Product Dimensions: 2.3 x 2.3 x 2.3 inches; 10.08 Ounces
- Editor's Impressions Of The Fluval A8343
- Treatment Effectiveness [star rating='3.6']
- Quality [star rating='4.9']
- Value For Money [star rating='3.6']
- Affordability [star rating='3.6']
Fluval A8343 Final Thoughts
"So easy to use."API Stress Coat is a phenomenal product. It is just as good when compared to other brands of conditioner. This is my absolute favorite conditioner I have used for all my aquatic creatures. My filter including polishing element could not clear it up. More doesn't hurt anything, but it's just wasted. Ever since I made this purchase, my fish are not dying at all. The water we get here in SoCal is hard with chlorine in it.
Overall Score
4.6
(178 Points)

8. Fluval Hagen Biological Enhancer for Aquariums
User Ratings: 85
Fluval A8352 First Impressions
"I have six tanks."The top is a measuring tool as well which I was not expecting. I read the reviews, and decided to give this a try. I used to use AmQuel years ago and then spent years out of the aquarium hobby. I was sort of nervous buy this product and trying it out. UV light works on it but not much else. I recieved it today at 3pm and applied it around 4pm. I'm interested to see how long it works.
- Fluval Hagen Biological Enhancer for Aquariums
- Immediately establishes safe biological aquarium environment
- Powerful responsive ammonia and nitrite elimination
- Prevents fish loss
- Allows immediate introduction of fish
- For Fresh and Saltwater Use
- Manufacture: Rolf C. Hagen (USA) Corp.
- Product Dimensions: 3.3 x 6.9 x 8.3 inches; 4.08 Pounds
- Editor's Impressions Of The Fluval A8352
- Treatment Effectiveness [star rating='4.5']
- Quality [star rating='5']
- Value For Money [star rating='4.8']
- Affordability [star rating='3.8']
Fluval A8352 Final Thoughts
"Give it a shot."I'm hoping this one works out if not I'm sticking to the one I used before. I've used it for years with great results. I wanted to see if it would take the chlorine out of my swimsuit. I recieved it today at 3pm and applied it around 4pm. Tim's cultures were obviously very alive and active. It is just as good when compared to other brands of conditioner. This only applies to the 1st application.
Overall Score
4.8
(87 Points)

9. Fluval Water Conditioner for Aquariums, 4-Ounce
User Ratings: 71 6
Fluval A8342 First Impressions
"I highly recommend!"This came just in time for my water change day! I like that it's a large bottle with multiple uses, so that's nice. I know you are going to want to add more chemicals, etc. I hope I made the right decision, Betty is our family pet and is really loved! From their own colon or a hole in the ground. But the septic tank bacteria did nothing. It has been 4 days and our beta is loving the clearer water.
- Fluval Water Conditioner for Aquariums, 4-Ounce
- Makes Tap Water Safe for fish
- Neutralizes chlorine, chloramines and heavy metals
- Protects the sensitive mucous membrane of the fish
- Patented stress reducing formula
- For Fresh and Saltwater Use
- Manufacture: Fluval
- Product Dimensions: 1.8 x 1.8 x 4.9 inches; 4.94 Ounces
- Editor's Impressions Of The Fluval A8342
- Treatment Effectiveness [star rating='3.5']
- Quality [star rating='4']
- Value For Money [star rating='5']
- Affordability [star rating='4.5']
Fluval A8342 Final Thoughts
"It really works."One planted that has algae problem so bad. When they disinfect a repair site, they are normally only using chlorine. I read the reviews, and decided to give this a try. If you're serious about fish keeping, always quarantine and always use Stress Coat! Its 9pm and the old cloudy water is now crystal clear! I'm amazed, I'm really amazed that this product worked so well. I hope I made the right decision, Betty is our family pet and is really loved!
Overall Score
4.5
(56 Points)

10. Fluval Quick Clear for Aquarium Water Treatment, 8-Ounce
User Ratings: 82 5
Fluval First Impressions
"I love it."I even poured in extra to help with the healing. I'm hoping this one works out if not I'm sticking to the one I used before. You need a source of ammonia to feed the bacteria which Dr. The aquasafe works instantly upon mixing with tap water. The live plants even looked like I just bought them. I read the instructions, measured out the product, and added it to the tank. DON'T just wait everything will be fine.
- Fluval Quick Clear for Aquarium Water Treatment, 8-Ounce
- 2-Count (Two 4 oz Bottles)
- Quick Clear effectively helps to eliminate undesirable particles that cause cloudy aquarium water caused by suspended organic and inorganic particles, dirt, slit and fine sand
- Traps floating particles, enhances filter absorption and creates crystal clear water
- For freshwater use only; safe for all aquarium inhabitants
- Made in Canada
- Manufacture: Fluval SEA
- Editor's Impressions Of The Fluval
- Treatment Effectiveness [star rating='5']
- Quality [star rating='4.1']
- Value For Money [star rating='3.9']
- Affordability [star rating='4.5']
Fluval Final Thoughts
"Recieved it in 2 days."In the morning I awoke with my fish at the bottom barely able to move. I could see it working immediately which was pretty wild. I recieved it today at 3pm and applied it around 4pm. I've used it for years with great results. The bottle will last me years as it is huge! It didn't kill the fish or cause any problems with the water so I stuck with it. Thanks to the Amazon reviewer who mentioned this!
Overall Score
4.5
(27 Points)
