3D Printer Filaments

Hello everyone!
I’m looking in to having a friend print me some things for my tanks on their 3D printer. I was wondering what filaments are safe for aquarium use? I have heard the PLA can be ok temporarily, and that it’s nontoxic. I’ve also heard that you should only use PETG in aquariums because it doesn’t ever absorb water even after a long time. I am hesitant to use PLA simply because of the longevity of the print.

If anyone knows anything more than this, please let me know. I just wanted to do what’s best for my fish!

I use only PETG for aquarium parts and especially anything that will be submerged in water. PLA will degrade over time when submerged and, for me, it is just simpler to use PETG for everything.