I've been dealing with this for a long time on and off....not even sure what type it is, but its driving me nuts. Chems are all in check. Magnesium is a little high, but its coming down. No phosphates, nitrates. Got a clean up crew to try and help, seems it might have actually gotten a bit worse. I was siphoning it off, holding off on water changes...feeding less...adding more movement...lights are on less then 8 hours. Trying not to use chemicals to solve it, but I'm getting to that point quickly. Any thoughts ideas. I did add more sand recently...could that have encouraged it to grow more. Any help would be greatly appreciated. It was mostly on the San, but now seems to be growing on the rocks a lot more.
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