RISEANDFLOAT
Aquarium Advice Apprentice
- Joined
- Jan 30, 2007
- Messages
- 41
How often should I do this. I have been reading a lot about the bio-wheel and little to nobody on this site recommends them but I do not have a skimmer yet. The tank (15G) has been setup for two months now and has had two cartridges in the filter since day one to boost and help maintain a beneficial bacteria bed. I am pretty sure it is almost time to change them but how often should I do it after I get in the process of switching the cartridges?