[shadowdrag0n]

just got a del rey 125 wet and dry and i dont know how they work? are they better than sponge AC
wouldnt the bio ball not be in the water it would just be half in? how do bioball work?

 

[Pharaoh]

The water will pour over the bioballs as the wetdry is working. the bioballs are what horbors the benificial bacteria in your sump. They have shown to be very effective in managing a tank, but it all comes down to personal opinion.

 

[parkayandbutter]

Read the article at www.txholeyrocks.com it's as plain as it gets for understanding wet dry filtration.