If you are getting a lot of precipitation, then you are likely dosing too much. 200ml for a 75 is a lot. If you aren't heavily stocked, and I see your stock list, then I would consider starting over from a dosing perspective.
I would suggest doing a large water change... 30% at least, and recording parameters. Start with .3ml/gal per day. Measure alk and cal each day for 5 days. That should give you a good idea of what your actual demand is. Adjustments can be made from there.