Hey Bev,
Have always experienced lower pH on most of my tanks, and my Ca, and alk are a little low. Bought the coral propagation book by Calfo, and he recommends; For water change: aerateing for a day, add buffer, then mix salt mix.
For top off: Aerate water then add buffer.
Just started trying so I will let you know the outcome. It won't help with the CO2 probs, but Calfo says the ro/di water ends up using up the buffer in salt mix, or your system, and that's why you have Ca and alk problems. Kinda makes sense to me. I used to work in a lab, and RO/DI water always had low pH. Hope this helps.
Mike
|