would it be toxic?could u melt the tubing to the cups with a lighter?
air line tubing is probobly to thin to make an effective vacuum hose, but no it wouldnt hurt them to try, you could fuse it with a lighter, sound like a lot of work though. what are the cotton balls for? mollies can eat, algea wafer, shrimp pellets, pellet food, granules, flake food, live frozen or freeze dreid= daphnia, shrimp, worms, fruitflies... sliced raw or blanched veggies like cucmber squash, zucini, spinich
