get a fully plastic clothes peg with no metal hinge
Drill a hole in the end of the peg
push half of a air hose joiner through the hole in the peg that you've drilled, should be tight though (may help to heat in boiling water or just cut 1 side putting a small slit in it thats what i did)
add a suction cup on other end of air hose connector
place food in peg
suction cup peg to side bottom of tank works for me beautifully
this only took five minutes to make, wife has not seen what i've done with her clothes pegs yet
will try to send photos step by step procedure
Roy