I'm soon setting up a 20cm cube for a a small group of Reed tetras, maybe 4-5ish, Its only 8ish liters so i know I'll need frequent water changes.
Biggest concern is Heating, I've got a 25W heater but its quite big, I've seen smaller ones in small display tanks at the lfs.
Any ideas?
And For filtration i was thinking I'll just make a small filter on top like the small jebo tanks etc or a under gravel filter?
Or any other ideas?
And I'm using a 23W energy saving bulb for the light