I just fed mine this morning, so here are a couple more pics. Like I said, I first drop in a few mysis, and when all the heads are out I feed them the rest. I blow around the mysis inside the bottle a few times until all the mysis are stuck to some waiting head. Some actually eat more than one. You can see how bloated a few of them are, as they gobble them down.
Today, I fed a complete cube, and they ate up every last mysis, none was left over. So they were definitely hungry.
Bottle on, added a few mysis and heads all out now ready for feeding.
Full cube of mysis in, and feeding under way.
Denny, I am not saying the in tank bottle method is better. I haven't tried your method, so can't speak to that. But it is interesting that you say yours are open 24/7. Mine are definitely not. I also have some Dendros though, and they are open 24/7.
Anyway, at least we know a couple methods that can be used. They are definitely a colourful addition to a tank, and not hard to keep healthy.
Oh, I should add that I have never had a situation where they didn't open up or fail to feed.