I never knew what aiptasia was but I always heard bad things about them. I noticed today that my rock that used to be full of zoas now only has 2 or 3 left. I noticed a while ago they were dying but I thought my choc chip starfish was eating them so I put him in another tank. Now I notice there's more dead and I finally looked up aiptasia.. and that is what's now all over the rock where the zoas used to be and in a couple other places also. So how do you get rid of them? Any help will be great