on 11/11/02 my readings ph 8.3,amm 0,nitrite 0, nitrates 0, alk 3.2, ca 350-400, phosphates .02, salt 1.022, temp 78. I did a 20 gallon water change on 11/10/02. I'm using a red sea wavemaster pro with 3 maxi jet 1000 powerheads. there is no phosphates in my r.o. water. I'm dosing kalkwasser...