12 days away, fed an appropriate amount of pellets every day and nori every 3-4 days. Phosphate 0.08, nitrate 0 (locked up in algae I’m guessing), alk 6.8. Scraping produced full sheets of algae which I tried to scoop out but the reef mat did 1.6m the day I cleaned it. I also have an INKBIRD and WiFi control of the ac. Final photo is after 20L water change. I’ll do another in two days to lower phosphate and raise alk slowly (coral pro salt will rapidly raise alk if I go any quicker). In future, I’d put a fan on the ‘chiller’ outlet for the INKBIRD and sit it to blow over the sump. Fish and inverts fine, green torch is only half extended (phosphate?), maybe some others have less colour but the alveo is the happiest I’ve ever seen it.