[Clown-N-Around]

One other thought - I don't know if you turn off your main pump for a few minutes when you feed, but that might help less food get sucked down to the sump before it is eaten. My fish are such agressive eaters that it barely touches the water, let alone the sump, but I was drooling over controllers yesterday and they have a feeding mode which made me think of that as a possible help for you.

I do like the snail idea a lot though, that should really help.