Hey guys, So, all 3 of my tanks are heavily planted and have water sprite floating on the top. The issue I'm having mostly with the 20g (and a little with the 10g) is that the water is barely circulating. I'm thinking this is a major attributor the algae issue I'm having in the 20. The 29g has 2 bubble stones attached to air pumps to help the circulation, but with the 20g in my room, I'm trying to avoid adding an air pump. Any recommendations on a powerhead that would work for the 20 high? It has a AC50 filter and is stocked with tetras, microrasbora, and a GBR. The 10g has a betta and 3 ADF, so I'm thinking a powerhead would be infeasible, but any suggestions to help the circulation would be amazing.