My Plecos and Silver Dollars love veggies and since I don't keep live plants I supplement their diet with assorted vegetables like cucumber, lettuce, and others. There are allot of different ways to keep these veggies from floating around like clips and weights so this is my version. No fuss no muss no net and your arm stays dry.
I purchased some chip clips from my local discount store. I made sure there was no metal on them that would rust. I attached one to a piece of plastic tubing (same depth as the tank) with wire ties and added a suction cup (the kind for X-Mas lights) at the top.