yep that's all sounding good. And yes that is floating catfish food at the zoos. I wouldnt put the wire on top though if I read that right, the elatic nature of the netting is by purpose, it is much easier on them when they fly up and hit it, the wire will just stop them the net will bounce them. As for feeding, once in the morning, like I said in a few days, you'll be able to guage just how much they eat, for two hottentots, it wont be much. 5 gallons use to feed a aviary of 300-400 birds for me of various species, sizes etc, teals eat the least of all, just watch and figure how much they eat in a day, and just give it to them once, will make life easier on you, if it's rainy, put the food bowl in the shelter that day and toss any wet leftovers when you get in. Yes 1 bag will last forever on the feed with just a few teal, and guess what, just so you know, Mazuir is a divison of Purina, pretty much any speciallty feed for exotics is made by them, they are a great feed company, I have used them for decades for all my livestock. And there is not much difference at all in it and purina layena or gamebird chow, the seaduck diet is the only one that's REALLY different, but only needed for eiders, harlequins, scoters, old squaw, stuff like that Get you some rest, you got this!!