Out of interest, would you have the ammonia reading before fish were added?
From memory bacteria will start to grow on carbon after two weeks or so. Normally that shouldn't matter when it gets replaced as you have heaps of bacteria in other filter media.
I've never been really convinced on bio-balls for surface area - wondering if the filter is struggling.
From memory bacteria will start to grow on carbon after two weeks or so. Normally that shouldn't matter when it gets replaced as you have heaps of bacteria in other filter media.
I've never been really convinced on bio-balls for surface area - wondering if the filter is struggling.