Fritz Clarifier 16oz

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  • Quickly Clears Cloudy Water
  • Safe For All Fish, Plants and Invertebrates
  • Improves Filter Efficiency

Fritz Clarifier is best suited for use on cloudy or hazy aquarium water where filtration alone isn't enough to clear it. The clarifier works by pulling together the free floating particles in the water which are causing the cloudiness and, therefore, allowing them to settle on the bottom or get picked up by your filter. We recommend waiting at least 24 hours between doses and doing a partial water change in between dosing.

Customer Reviews

Based on 68 reviews
Lillian M. (Evanston, IL, US)
Clarifier saved my tank from cloud cover

After a few weeks in a new tank, the water in my 10-gallon aquarium got that London Fog that simply would.not.go.away. I tried doing 25% water changes, gravel cleaner, additional filtration - nothing seemed to do the job. This stuff just WORKS and its very easy to use. No negative effect on my fish. Definitely give this a try if your water is cloudy - I used it 1x a day at first as a test, then upped to 2x a day. I noticed a difference within one day, and everything was clear in about 4 days.

Gail (Langley, WA, US)
Love It!

I made every noob mistake you could make with a new 75 gallon tank until you couldn't see 2 inches into the tank for the algae bloom. Fish? Where's the fish? I don't see fish . . . .
I took care of lowering the amount of time the lights were on, lowering the brightness, and feeding less. After that I added Fritz Clarifier and waited for 2 days I did a 30% water change and added more Fritz Clarifier, as directed on the bottle, over the next 2 days. It's been about 2.5 weeks now and the water is crystal clear. We added more plants and fish, 23 small community fish now.
I'm very happy, Aquarium Co-op is the best and I'm very grateful to have them as a resource!

JCW (Atlanta, GA, US)
Fritz Clarifier

I used Fritz Clarifier on a 14 gallon and 10 gallon aquarium. The 14 gallon has live plants, but the 10 gallon only has plant-like decorations. Both have significantly clearer water after treatment. I have treated both tanks 2-times in about 1 week even though the instructions say I can treat every 6 hours I haven't compared this product with competitors, but I can confidently recommend it with my results.

Michael I. (Interlochen, MI, US)
Fritz Water Clarifier….

I am so pleased with the results the clarifier caused in my aquarium. I added it one day and the next did a water change, rinsing the pre-filter sponge on my HOB filter and the sponges inside it. “Both” had much more gunk caught in them and it had only been a few days since I’d rinsed them. The clarifier works GREAT at collecting smaller particles, which in turn helps the filter to become more efficient.

Nate (Tucson, AZ, US)
Clear tank

Started using the clarifier and in a week I have pretty much crystal clear water. Started off with green to brownish with dirted tank and after parameters got stable the clarifier just made it pop clear. So far awesome product.