Went out of town for the weekend and came back to diatoms in full bloom. Picture doesn't really do it justice. They're all over the rocks and the rockscape on the backs and sides, the pumps, sand, and glass.
In addition to the diatoms there's a few tufts of green hair algae. I have, for now, turned the lighting back off. I have placed a CUC order and plan to wait until they are here before I turn the lights back on.
In the meantime, I finished printing and installing some fans to cool the atlas heatsinks. Just in time for me to turn the lights off for now!
There are 4 noctua 140mm fans aimed at passing air across the heatsinks and towards my ceiling exhaust fan. Will have to check the temp when I have the lights back on to see if it affects the temp at all.