Thanks for all the responses!
Qwertus - the KH out of my tap is almost nonexistent (GH, too). I haven't had problems with the pH before this. It usually runs between 7.2 and 7.4. I've been told not to worry about the KH but I'm still not sure I'm comfortable with that.
Eric - I'm using Black flourite. I changed to that a little less than a year ago with a dusting of peat and mulm on the bottom. With the GH and KH so low out of the tap, and the pH at 7.4 I'm concerned about the pH being too high if I try to raise the other 2 parameters. I had been thinking of using Equilibrium for to raise the GH for the plants, though.
maknwar - I think it was a combination of bacteria dying off when I lost power and the crypts melting that caused an ammonia spike and the cloudiness. I have to figure out a better WC routine. I don't do it very often.
My tank seems to be kind of a hybrid. It's not really el natural, it's definitely not high tech. I get all kinds of conflicting advice from people who are very involved with aquariums, whether as a hobby or professionally, as to how often and how much water I should be changing. Also, I think I should be upgrading my lights. A few other things could be tweaked, but for now I'll deal with the pH.