Lol! I had the same issue, so annoying ... I now have micron fabric sitting at the top of the overflow, and would keep the fish from going down ... in fact, it would keep them wet enough to survive, then I'd throw em back in ... very annoying though to take the covers off and get them ... I tried just putting a rubberband around to basically make the holes half as big, but that was annoying as well ... I know your an experienced hobbyist, so dont misunderstand me when I say this, but rather than dumping 30 feeders in or 50, or whatever, drop them in 1 at a time instead and keep the others in small tank ... or even a bucket with a filter ... it'll keep water/overflows cleaner and will train the fish to hit whatever falls in, thus making silverside/pellet training much easier .... I used to buy a bag of 500 comets weekly when my ATFs and everyone else were smaller and all in my 220, and man was that fun to watch!
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