black algae

I have this slime on my sand bed and on some of my rock. The slime sticks to the rock and sticks pieces of sand to it. I can’t suck it out with a siphon the sand that sticks to it weighs it down. I have to manual remove the slime and the sand that is attacked to it as well.

Tank: 10 gallon AIO TL;DR neglected tank, what’s the best way to clean up so my pump quit working while I was out of town, took a while to notice, order new pump, install, etc. in the mean time, I’ve developed some hair algae, algae growth on the glass, and all kinds of algae along the glass of...