Hi, have a problem with dirty, cloudy water. Have had tank set up for two months and have regular water/filter changes. The Nitrite is 0, the O2 is good. I have a siphon cleaner for the stones and clean weekly. I have 4 Mollies, 4 platies, some Neon Tetra and 2 Plecos. I am missing something important? Is there anything to keep the water clearer? Please advise. Thanks in advance. John