I like the bottle idea, very nifty!
You can also fill two squirters like turkey basters, and squirt one on each end of the tank and keep em busy while the corals eat. lol I had to do this when I had a delicate copperbadn buttrerfly or else the tangs would take food outta his mouth. lol
180g Reef - 60g Rimless Reef -90G FOWLR- 125g Malawi Cichlids- 40b REEF- 34g Fresh Planted-working on- 20L FOWLR- working on
I have a mix of many different saltwater fish amongst my tanks, but I love my Tangs most of all.