heya. that's actually sounds good in theory, but like you said, you could really only do it in a practical manor with small frags...so having a 20 gallon frag tank would kind of serve the same purpose, no? just my opinion. i just target feed. it works wonders for me...i mix coral accel with other foods almost every night. colors are insane, and so is growth on all corals. the problem you get with moving a frag back and forth is that if you want it to eventually encrust the rock you have it on/near, it won't be able to do so. that's why i hate my damn turbo snails!!! bastards always knock stuff over! lol!