That makes sense.

This brings up a couple more questions.

First, is there a test kit that will test for ammonia, nitrates and nitrites? I'd hate to put a bunch of work into it only to not have the proper biological actions happening in there.

Second, in the sump, would I be able to put a raft with some plants in it? Do all plants require oxygen to the roots? If so, how do you provide that to plants in a raft?

Thanks again