I have a friend that got a used set up not long ago and has been running the same HOB filter as the previous owner. Now he has a sump he is wanting to set up. He got bio balls to go with it. I suggested LR rubble. I am thinking if it is like FW he can run both for a couple of weeks so the sump can build up good bacteria and the phase out the HOB.
b
I am to new at SW to beable to feel comfortable telling him.
TIA
b
I am to new at SW to beable to feel comfortable telling him.
TIA