new tank has calcium film developing on glass... whats up???

[Troy F]

If memory serves me right, Ca and pH are too high. It's the same thing that happens if you are dosing more limewater to a system than the inhabitants can handle. I think. The answer is in one of Randy's articles but I don't know which one and (sorry) don't feel like looking. Unless you need the information, it can be pretty dry reading.