So my tanks been running for about 2 months, and I've been using water from the local Oasis water shop. I was recently told this is'nt good not sure why. As I under stand this water not only goes through RO process but also through ozone treatment. I have tested the water for the following. phosphates=0 nitrates=0 nitrites=0 ammonia=0 copper=0 alkalinity=very low too low for my test to even get a proper reading. pH=gives false reading due to low alk and therefore having no buffering capacity. So far I haven't had any problems with the tank other then a bit of Hair algae, and diatoms, that I figured is normal. Specially in a new tank. I was wondering if anyone else uses this water and if anyone has had any problems with it.