Hello, I have a 75g drilled tank, 30g tank for a sump. The tank has been running for about 13 years. It's lightly stocked, right now one clownfish (whose buddy of 12 years just passed away) and one yellow tail blue damsel. There's a green bubble tipped anemone that's been in there since the beginning, it's since split numerous times, I counted ten the other day. Red Monti that grows like weeds, colt coral that also grows like weeds, mushroom coral, and blue acro, along with an urchin and sand sifting sea star. Water movement is a Tunze wavebox and one turbelle stream. Filtration is a diy protein skimmer driven. Lighting is a current USA T-5 six lamp fixture. I don't do much testing. I've experimented with refugiums and growing chaeto in the sump, which worked well except the fan in the led light became so noisy my wife made me shut it off. Since then all the algae has migrated back to the DT. So my new initiative is to get a algae scrubber up and running. The slotted tube is clamped to a piece of acrylic that hangs from the top of the sump, it is fed from the durso stand pipe in the overflow which is 220 gph, the screen is 6" wide and 8" long. This is the light Procyon 17" - 2017 Model, and is 12" away from the screen, photoperiod is on 18, off 6. It's been running for one week, and I'm seeing a greenish hue to the screen. My next move is to shield the rest of the sump from the light. Anyway let me know what you think please. Hopefully the pics are able to be seen. Thanks!