Hmmm, I am purchasing a 125g with a trickle sump. I have a much larger sump left over from my 120g reef I was going to use, thinking bigger holds more water is better. The old reef sump has a large sponge in it, I was thinking about putting some bio balls in the compartment directly to the left of it. So, from right to left, water in, bio balls, sponge, water out. I want to set up a Tangy tank, with Multi's, Sumbu's, Calvus and a few mid swimmers. Comments please....
PS sorry to hijack this thread...