I still can't figure out how to get rid of diatoms in my reef. I literally have to scrub the glass every single day or it gets out of control.
I'm using the cheap Chinese LEDs, hung about 13 inches above the tank (45g bowfront). I run them about 10 hrs/day. Blues on for 1 hr, both on for a good 8 or 9, and then just blues again for an hour, then off.
Water chemistry tests out 0 for the ammonia no2
. PH has always been low 7.8-7.9. I've tested for phosphates a couple times and they're trace.. very minimal.
Using chaeto to outcompete for phosphates
turning on only the blue or white lights at a time (they have reds in them and I was told the reds are notorious for algae)
cutting back on light period (5-6 hours total)
water changes. Lots of them. huge ones and small ones.
Lots of snails/lettuce nudibranch for cleaning up.
2 powerheads in it currently. Plenty of flow.