I think I may have found part of the problem. First of all, I went to my local LFS
and asked for a magnesium test kit. They looked at me like I was from Mars. (it is not my favorite LFS
but it is the closest) So I have not gone to the other LFS
yet because it is an hour away.
Anyway, I read a post from Hara that stated pH can drop in an covered tank. I had mine covered because I was scared my kids could plop something in there. I could never get my pH to go above 8 in spite of dosing. I uncovered it and the pH went to 8.3 in a matter of 3 days. I tested my make up water (which I keep in a covered 5 gallon bucket and make it up a week ahead of time) and the pH was 8.0 . I guess I need to keep that uncovered as well. I cover it because I am worried about any thing which could go in it inadvertently. (aeresol sprays, stuff in my garage, who knows. I will also buy a couple of powerheads to keep my make up water aerated. What do you think , could this be the source of my problem?