Hiya Gizmo. Having a lot of hair algae usually means you have a nutrient problem that is feeding the algae. A blenny will eat the algae but will then poop out 90% of what ever it eats, so not a real good way to try to battle it. The best way to get rid of an algae problem is to kill its food source. So a couple of questions. What do you use for top off water, tap or ro
??, whats you feeding regime like??? what kind of things do you have in your tank?? and what do you use for filtration??
Harvesting the hair algae is not a real bad thing, it will cause the algae to spore a bit and might psead it a bit, but removing it removes the nutrients that it has bound up.