[30reef]

I also use a sock on my BB 30g SPS. I change it out every 3 or 4 days. I have been contemplating removing it so I can allow all of the small waterborn critters to circulate but I'll prolly leave it. I set my sump up with a refugium and DSB originally but removed them both after having some browning issues. Now all is good with growth and color. I have 4 socks so I only have to clean them in 2 week intervals so it's no big deal. It's amazing how much carbon dust my sock traps after changing the carbon/GFO mixture in the reactor in the sump. That would still float aroung in there without one.