Got a few spots of calcium scaling showing up (took a couple of small crystals-with MA fizz test). Not a lot-about 5 or 6 small one. Wouldn't think with my test numbers that it would happen. But been really hot-humid here in Fl., have taken to using fountain like Dave S. (thanks) to lower water temp. Don't know if this has caused it, have not had it before. Just efflorescence.
Should I be concerned about this to much? I just take a nut pick and scrape it off. If I don't get 100% of it off, will it matter. They are really small areas, and I didn't want to have to do a MA wash of each spot.