How to you reduce phosphates that are off the charts? I have an API Phosphate test that measures up to 10 PPM. And based on the color gradients, I'd guess I have something like 60-100PPM!!!!!! And, the pea soup is getting old. My readings are: 0 ammonia, 0 nitrite, 0 nitrate, 7.6 pH (up from the normal 6.5), 6 GH, 4 kH, and 10++++++++++ phosphates. My 90 gallon is having issues, but the 29 gallon seems to be fine....at least the water is crystal clear and the diatoms are minimal. What can I do that won't break the bank or kill my plants?