thats the hard way... the easy way...
I had a clam shell... stinking clam, but thats besides the point.
one half of the shell sits on the bottom, and I feed in there.
I got fancy when my tank broke so when I fixed it, I also siliconed the other half of the clam shell to the tank, about 8" below the waterline, so my hand won't get as wet... I feed via turkey-baster.