ok so first off about a year ago I had dinos terrible and after getting help here on the forums I did win that battle. It took about 4 months to get rid of them totally. I know I made mistake along the way and because of my boneheaded moves infected a few tanks with it. But after that was gone, everything was great.... till about 3-4 months ago. I had Bryopis in the same tank and it just took over like a weed and after a few weeks of a month not sure but someone told me about Reef Flux and wahtca know that stuff was gone within a few weeks. Now to the current plague of mine... I got Ulva or AKA Sea Lettuce and it grows faster than anything, I currently learned that hydrogen peroxide kills it pretty quick. I wanted to ask before I started up dipping or spraying plugs or rocks whats the good and bad for using peroxide. I got just a normal 3% spray/bottle solution from Walmart. It's mostly on frag plugs and racks almost all Zoa's, but there are a few Duncans, Acans, and at least 1 Torch. The goal is to clean every plug and rack as I move them to a different tank.