Liz,
I use these rubber hoses we use for boilers and plumbing work. I think they may be good year? I don't even know but honestly like you thanks fuly never had any issues I never really through by twice about it but I do believe as you say the fish will tell you.
On a second note thanks for the follow up on thag hose! I've seen them and keep saying I want to get one. I will do so now