What supernerd said, they DO need to be fed phyto (or at least have it regularly in the water column) or it WILL starve to death with in the next year. Your little contraption there is an awesome idea. I just wouldn't do it more than once a week. OR you can just dose the whole tank 3-4 times a week(which is what I do), leaving the skimmer off for about and hour(maybe 2, it's up to you) when dosing.
FWIW,
Brianna:rollface: