pesky flatworms!

[Silverfish]

Hey reefers, I have a question. I have those pesky little brown flatworms in my 60g 15g 30g sump system. I don't want to try chemicals if I can help it and siphoning them is working ok but I was wondering if anybody had thoughts on mandarins or wrasses. I heard that the eight line wrasse may eat flatties a little more than six lines. Are the eight line wrasses hard to come by? I also have lots of pods and such in my system but I don't know if I want to risk a mandarin, they are just too cool. I actually don't have any fish in my 60g display right now, just 2 cleaner shrimp, a brittle star, tigger tail cuke, bunch o snails, 1 emerald crab(maybe 2),and a citron goby and a maroon clown in the 15g. I know there has been a lot of discussion on flatworms lately. Thanks for any input or advice, Bruce. ps, any good fish info sites out there?