I went to my store today to grab some things, one of which was gonna be an additional pump for circulating the water. The owner who is a trusted source and very knowledgeable on nectar says he runs into the same issue and although the pump will remedy it some, it won't be as effective as needed. He said he will just give it a mix every 30 seconds or so. Guess just a pain of organics. But I'm gonna try the impeller setup you suggested there and see if it can prevent me from having to stir so much.