I also have a CR10(s) pretty decent printer if you are willing to work out its quirks.
For water applications PET or PLA would be the best don’t use nylon and ABS is a bitch to print with without enclosures.
I would recommend you getting some protective epoxy for any prints you want to last for anything that is going to be in water just sand the part and put a marine epoxy layer on top of it the additional weight isn’t an issue.
For water applications PET or PLA would be the best don’t use nylon and ABS is a bitch to print with without enclosures.
I would recommend you getting some protective epoxy for any prints you want to last for anything that is going to be in water just sand the part and put a marine epoxy layer on top of it the additional weight isn’t an issue.