hydrogen peroxide and GHA death

[Borderjumper]

Originally Posted by Rogue951

no offence but can someone else verify this? =)
cause I REALLY have thick green hair algae issues. the only thing that will remotely touch it are urchins. but they strip the thing down to the rock, uncluding the coraline.

Why don't you take out a small piece of rock and give it a try? that's the only way you will know for sure.