Blowing the red slime cyanobacteria is not the best thing, because you are basically moving the slime elsewhere in the tank which will just allow it to spread to even more places. Take a siphon and remove it out perferable a slower siphon so you can collect as much as possible without losing too much water, the slime will come out in sheets and is very loose, you'll pick up the coral sand as well, just rinse it out really good with RO water before you place it back in. Those that are on the rocks will come off just as easily. Take notes on more flow, regular maintainence, RO water for makeup and top up, a really really really good efficient skimmer and keep that skimmer in good working condition, good quality lamps not old bulbs, less feeding but no overfeeding, keep on top of the slime cyanobacteria when you see it forming siphon it out. Lots of patient and eventually if you're good, then it will disappear. Regards and best of luck.
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