No. Not Kalk.
NDaquarist gave me some pods and I’ve been growing them and splitting them. I got some phyto from a local supplier to feed the pods. Won’t mention their name but I’m not impressed with their phyto.
I grew my own phytoplankton with my last system. Nano, Tetra, and Iso. It was always a long term goal to get that going with my new system. A stirrer is ideal for keeping the non-motile species in suspension so that that the culture doesn’t suffocate.
I’m working on a four-station stir plate. I’ll also add some adjustable air for bubbling each if I want to do that instead to in addition to stirring.