Water Flow w/o Filter
I have a 4-gallon cube going right now. I'm attempting a dirt + heavily planted setup without a filter. It has a heater but I don't notice any significant water movement due to convection. My main concern is that stagnant water will become an issue at some point.
I transferred a few cherry shrimp from my main tank just to see how they would do. They seem to be doing ok. The eventual inhabitant will be my betta.
Any tips or thoughts regarding the stagnant water?