I turn off the UV until it runs clear, apparently it’s surface living bacteria so once they have settled it should start feeding off all the detritus. Purigen and carbon are fine it’s not a chemical. I have a population that seems to live in my sump chambers but I think it all gets eaten as biofilm in the tank. It also keeps your bio filters clean too.
It’s one scoop per 50G once a week. If your tank is small dose half that twice a week.
Another favorite os Papyrus (Umbrella Palm(Cyperus papyrus)) it normally grows on the waters edge from Africa, Madagascar, India, and the middle east
I've grown it in sumps, pond, and tanks
Cichlids such as Cinelichthys bocourti and pearsi are some of the few tat can eat the papery stems.
One of its disadvantages is it can grow massive if unchecked, up to 10 ft tall, and the root ball can almost fill a 6 ft tank.
After it outgrew my 6ft sump, I planted it in the yard where the washing machine drains, and iy took off.