Curious about ways to deal with a cyanobacteria issue in a tank I've adopted from an acquaintance. I've already manually cleaned out most of it and will continue vacuuming the gravel and doing water changes, but I couldn't get it all and I can tell it's starting to creep back a bit after only a day. The tank was overfed before I got it, so I'm cutting back on feedings to try to limit nutrient input. I'm hopeful that this will be the primary solution, but I'm wondering if shrimp might help as well. I've heard they won't actually eat the cyanobacteria, but would their sifting around in the gravel help break up the colonies?