Hi, I've been trying to get to grips with this ATS thing but I'm struggling, any advice would be appreciated.... My reef has been set up for about 4 years, I came across scrubbers about 2 yrs ago and DIYd one with a couple CFLs and some baking sheet liner, success was limited. I scrapped the DIY and bought a seabreeze unit which I've never really set up properly, the screen wasn't roughed, flow never checked etc. I'm now trying to sort it properly because the nuisance algae is now problem algae! The tank is 300l including sump, it is fully stocked for fish (only 5 small corals in it at the minute) and I feed 1 cube of frozen per day. I have a Bubble Magus Curve 5 skimmer running which recently has stopped pulling much, if anything, out of the water - I don't know why, I found nothing wrong with it. Reading the new guideines which are geared towards feeding, I'm wondering if I should cut down the screen size on my scrubber (approx 10 x 4 inches) or increase feeding to the tank? Or something else? When I removed the Seabreeze to service it I noticed that a few of the reds are out on 1 side of the scrubber, is this a problem? When I refit the scrubber I intend to plumb it in from the return pump with a tee and 1/4 turn valve to get control of the flow. I'd really appreciate some advice. Thank you.