Mackwell
Aquarium Advice Apprentice
- Joined
- Apr 12, 2013
- Messages
- 17
just float a bottle cap over it, I'm doing this so the new duckweed doesn't get sucked down. there might be other reasons one wouldn't want the overflow to skim the water I guess, like to prevent floating food from going down, etc.
whenever I come across a black cap I will probably replace the clear one with it.
whenever I come across a black cap I will probably replace the clear one with it.