I have a Jade File Fish FS $20. It is full size at about 4". It is an aiptasia eating machine. It mowed down 99% of my aiptasia in about 16 days. The only catch is when the aiptasia are gone it will eat zoa's and lps like acans. I was going to leave it in to eat the rest of the aiptasia but it took a bite out of my acans. The good thing is it is a really easy fish to catch. It will cure your aiptasia problem in no time then you could remove it and sell and keep passing it on or if you have sps only you could leave it in. I really like the fish but love lps more.. It is currently in my sump. I don't want to be cruel and leave it in there too long so if it is not sold by Monday or Tuesday I will be taking it to a LFS.