Some reviews say it doesn't work, some say it works. I tried it and wasn't happy at first. Then I realized I was using it incorrectly. One drop per liter of aquarium water EVERY day. So I started dripping four drops each day for the four gallons I have. I was amazed at how clear the water was after 3 days of proper use. So I started skipping days and it's still clear. I highly recommend this product for cloudy water in your aquarium.
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