Divided 5 gallon planted betta tank

This tank has Echo-Complete substrate for planted tanks. Two male betta and one female in the compartment with the filter. Her smaller fins make it easier to put up with the current. I make these dividers myself from plastic canvas and binder clips. They are siliconed to the side of the tank and come out pretty easy when I need to clean them. I am using a mini whisper filter in this tank...and a 25watt heater. I dose every day with Excel.