Is that a kalk stirrer? I’m trying to figure out how it works. The pump is in place of the stirring mechanism?Not much of an update but here's a new toy I just got. Geos kalkwasser reactor have to wait for 6 weeks for this. Let see how much of a difference in ph will be in couple of days. Hopefully will get to 8.2-8.3 which I'm aiming for. Currently sitting at 7.7-7.9 I guess it's fine for some people but heard high ph will have better growth so mine as well try it out