U Barbs for Aquarium, 1/2" and 3/4"

Some random u barbs I designed for my aquariums, I think to pump water into an open piece of pvc plumbing (it's been a while since I made these).

Unlikely to be totally water tight around the barb, but works great if you're just moving water around in the same bucket/aquarium

PETG recommended, but PLA totally works.