LAWN MOWER BLENNY!!!! i want one really badly but hair algee dosent live very long in my tank and im afrade he will die after he ate all of it up
if you dont have any corals ( which isnt likly) then just leave your lights off for a week and your done with algee hehe
and yes dont use tap water, you can get away with it for awhile and then one day hair starts to grow and you cant figure it out, its the tap water, tap can also make cyno (red slime), green film alge and other non wanted algees to grow really fast, like bubble alge also
so if your useing a RO/DI check that water for phosphates, if your useing tap start useing RO