- Reaction score
- 5 to 10 years
I have just put a sponge filter in my cycled 5 gal and plan to remove the HOB filter once the sponge filter has developed enough BB to avoid a mini-cycle (this is for my betta - he can't take the turbulence of the HOB filter). How long is this likely to take? The betta is back in his bowl and I will be keeping the BB fed with ammonia.