I’ve recently had a spike in the phosphate level in my tank(92 gallon). I’ve tried more frequent water changes, which lowers the level for a few days, but then it creeps back up. I’ve tried putting GFO in a mesh bag in the tank. That’s not working either. I’ve been researching chaeto algae and everything I read on it says it works good. I’m running a sump and was wondering if I could put the chaeto in my sump with a light? Basically turning my sump into a sump/refugium. Are there any problems with this?