Ok, I am having daily issues with brown algae. It is all over my tank. Even in high flow areas. It is on my coral and killing my SPS. I came home today to find my cheato floating in my fuge breaking apart, even though it is running on an opposite lighting schedule as my DT even though the money plant appears to be fine.
It's dinoflagellates then. They put out their own gasses. A way to get rid of them is to raise ph (slowly, you don't want to stress anything), and start doing blackouts. I'm sure there are a few more things but they are tough to get rid of. They are toxic, so a cuc won't eat them.
Ok, I believe the solution to getting this under control is getting my reactor back online. To do so, I need my return pump to attach to the flex tubing. There really isn't a piece that will do the job...thoughts on just siliconing it in place? It'll end up being the ball valve having the flex tubing placed into it, clipped in place, and filling it with silicon.
For me the gfo/carbon reactor fixed this very same problem. I tried all kinds of creatures but that doesnt help the root of the problem. You have high nitrates/phosphates and the reactor will fix that.