The one that we get from the drug store here is 3% I beleive and that's what I use.

I leave the frag in there for a minute or 2 and I can see all sort of things coming out of my frags. It is amazing how well those bristle worms can hide. Also I use 1/4 peroxyde but some people goes as strong as 1/2 peroxyde. I have done it with that much but I do not beleive it is necessary, as long as you see some fizz in there, it will work.

Thanks for your informations. I try to dip my frag. so far I lost 8 polyps out of 10. need to save last two. Thanks again

Good luck with them. Hope they will make it.

Zoanthus sociatus especially can be difficult (small polyps).

On the other end my palythoas are practically undestructible. a few days ago I theared a few pink and gold polyps as they were anchored to a rock that I had to move and they survived and the polyps are all open today and completely healed. The head survived despite most of the body being missing! I used a razor blade to cut the bottom part off. Can't kill those things.

OK, I dipped in peroxide. Hope they survive.