I have a 75 gallon fowlr
which has been up and running for over a year. I've had problems with diatom algae for a long time.
There was a couple months where my daylight lamp broke and I was only using blue/red lighting. During that period there was no algae.
A couple weeks ago I got a new light fixture and the algae has come back strong. it's mainly on the sand now currently but is starting to show up on the glass and rocks. It disappears overnight when the lights are off but right when the lights come on in the morning it quickly returns.
I use RO
water and do big water changes biweekly. My parameters are basically all zero. I have a protein skimmer and am running charcoal and a phosphate pad.
What do I do? Is this a temporary thing because of the new lighting? It's been a pretty constant problem for me. I've read a lot about it but everyone says its a temporary bloom for new tanks.
Any help would be appreciated.