Hi, I have one of those "Penguin" brand bio-wheel filters with the sponge/carbon bits in it.
I'm wondering, when/how you would change the filter without getting rid of hte beneficial bacteria?
Do I let the new filter soak in the tank water while the old filter is running? Then throw out the old filter and put in the new one?
I'm wondering, when/how you would change the filter without getting rid of hte beneficial bacteria?
Do I let the new filter soak in the tank water while the old filter is running? Then throw out the old filter and put in the new one?