Join Date: Oct 2017
Location: San Francisco, CA
Evenly heating a filterless nano cube.
I've just set up a filterless, low-tech, Walstad, 4 gallon (10") cube, with some hornwood, and various low-light plants.
I put in a 25-watt Cobalt Aquatics Neo-Therm heater, in the rear corner, but without a filter, it's not heating the water evenly.
Near the heater, it's 78 F. But, just 3" away from the heater, it dips down to 74 F.
Any suggestions? Maybe I can run 2 x 5-watt heaters, on opposite sides of the tank?