I'm in need of additional nutrient export for my tank. A slightly wet running skimmer and 25% water changes every other week won't get my water below ~25ppm NO3 (sometimes even higher) and algae is becoming an issue. I'd love a decent size refugium, but I just can't make it work with my current setup, so was thinking about an ATS. I could go DIY, or could purchase... This one looks good, even though a little pricey: https://www.bulkreefsupply.com/cw-100-external-algae-scrubber-clear-water.html Does anyone have experience with one of these?