"I don't normally leave reviews but this product is that good. After doing a 25% water change, the water in my tank got murky. Then my loving wife let some sunlight directly hit the tank and to our surprise the water went from murky to green. I tried frequent water changes and even added a extra carbon bag. Nothing seem to work. Then I put 5 drops into my 30 gallon tank and in about an hour, all the green water was gone. The only thing was that I had to replace my filter sponge but other then that it worked great. Highly recommed it!"
