bio balls sump

I'm new to the saltwater side of aquarist and i've been hearing a lot about bio balls being bad and being good. My question is as follows... Is there any truth to this? Also is a wet dry rack in sump okay for saltwater?

I will be moving my 180g down stairs and framing it into the wall. I got 2 new wet drys and a skimmer. I have read that bio balls just create more nitrates in the water, does anyone use bio balls? If not what do you use if anything?

Hi all, Wish I'd done a little further research before the setup of this tank. At 30 days old my nitrates are primarily setting at 20ppm and moving to 30 by the end of a week. I've been reading about bb and I'm wondering if this is the problem. Knowing that this is a young tank wiith a small...

im setting up a 10g sump in a 30g long... never set up a sump befor and i finaly think i got the concept. I'm drilling and having an internal overflow box. It runs down into the sump which is filled with (here's the question) just live rock,sand and algaes(which kinds)?. I have a lot of live...