I've noticed that as well in my fresh water top off container. I haven't done anything about it but the other day I did bring my water change container outside to hose out the bottom. I had a lot of calcium deposit buildup in there which may have been leading to further precipitation. One of these days I'll properly go at both of them with the pressure washer but so far I haven't and they've been in use for a few years now. However if I were to make a recommendation, once a year would probably be it.
|