Review on Natural Rapport Aquarium Gravel Cleaner: Enhance Fish Health & Tank Hygiene with the Ultimate Gravel Cleaning Solution (16 fl oz) by Jenny Davis

First test strip before I used gravel cleaner and second strip the next day. Pink measures the amount of nitrate in the water. I have a 10 gallon tank but I did NOT use a full cap. I saw some reviews talking about how their fish died so I used about 1/5 of a full cap. It took all day but the nitrates were all out of the water! And my fish are looking good. My aquarium smelled a bit and I thought gravel cleaner wouldn't help, but after about 4 days the smell gradually disappeared. And my water is cleaner. As such, I only recommend not using the full recommended amount. It may take longer but I think it's easier for the fish. For reference, I have a rooster, two African dwarf frogs, and armored catfish.