Just put the old foam filter sleeve back on my Euroreef skimmer's output--used to eliminate splashing in sump & microbubbles--- and was wondering if it would add any signifigant amount of nitrates to my sps tank-- like a wet/dry? Plan on rinsing it out once a week. I had the gate valve mod on it for the past year but need more room in my sump for other things & the mod takes up too much room. I first tried putting a 2 liter bottle over the output to quiet the splashing in the sump which someone on RC suggested but couldn't make it work. So if nitrates are going to be a problem with the sponge back on does anyone know of another way to quiet the output without the sponge?