I used the screwcumber things, they are so handy!! Tbh... i would happily pay the £3 for 2 again if i dont have to sit looking at my fish looking really smug as they poop on my cutlery... knowing that it doesnt matter how much i clean it... i wont get the smug image out of my mind!
Underworld used to make great lettuce clips, a completely plastic peg attatched to a sucker... but Underworld went bust and sold up, im not entirely sure who took their stock so I cant find the ones i mean now they were fantastic for sheets of algae/nori
I cut my courgette long ways into two and then into half (four pieces per fruit) it so they are nice chunky peices with lots of flesh. Then stick a spoon inside it (next to the skin) and slide it in the tank. They love it.