I had a return pump go out on me about 3 weeks ago and my tank was with out circulation, other than powerheads, for about a week. since then I have noticed a cloudy haze in the water. I have done one water change last week, and im prepping another water change for today. Alk was higher than my normal, around 11-12 dkh when i tested last week, cal was at like 420-440. Is this just do to an inbalance in the alk/cal? how do i lower the alk? should it be that high? Let me know and thanks in advance.