Should you replace ebb and flow bucket system hoses every grow?

I was told I should do this today by the guy at the store. I have never had an issue and never had a clog. I use smart pots in in oxygen pot buckets so maybe that's why? Is he just trying to sell me something?

You could replace them...or you could just clean them.

I don't think he's concerned with clogging since those are what 3/4" lines? He's probably airing on the safe side but if you clean/disinfect your hoses, you should be fine. That said, 50' of 3/4" is cheap, easy to replace, and guarantees no contamination.

I just wash and reuse .no problems at all. I have around 400ft of 3/4in one room

Run some h202 water through your system for an hour. no need to rinse after. Easy peasy. Unless you like spending money unnecessarily.

h202 cleans it all up as long as your hoses arent 1/8", should be 1/4" at a minimum, prefer 5/16 for feeder hoses