Just a quick question. I tested my reef tank with hanna for nitrates, and the result came to 0.21 ppm, and I was wondering if that was a healthy amount of phosphates for my 30 gallon saltwater nano tank. I've got a few coral frags in it, and a gorgonian, along with three fish, and a good cleanup crew. What phosphate levels to you guys try to keep your tanks at? The nitrates are also 2-5ppm, if that helps