i used the clear light protector from home depot the ones the go over the florescent bulbs it come pretty long and u cut it to size i put it over the corals and throw the food down it
Just cut the tip of the julians thing to make it bigger.
Rio feeder
When I had my 90 I used a simple turkey bastor. It worked pretty well, but you need to get your hands wet to reach corals on the bottom.