So I have talked my husband into helping me build an algae turf scrubber. YAY!! I've seen a lot of talk on here about how effective they are at keeping nitrates and phosphates down and keeping parameters stable, but it's difficult trying to figure out how to actually get or build these things. It looks like these are mostly done DIY.... But we are good at DIY, so that's OK. Wikipedia helped show me how to make them Algae scrubber - Wikipedia, the free encyclopedia However, it is still slightly confusing, and I am wondering about the plumbing. We are thinking we might have to get a pump for this thing to run as it's own filter system, because we have already glued in the pipe and the flow to the refugium isn't set up to go at 350gph (we will need that because with our tank and sump we're at 100 gallons and recommended flow for ATS is 3.5 X total #gallons in system). We are going to install the ATS in our refugium, because that's the only place it will fit with our sump design. I am just wondering if there is anyone else out there who has a separate pump for the ATS, or does that sound practical? And I'm also going to update with pics as we get this thing built.