You can reuse them....either bleach or I actually use H202 to disinfect them because after 24 hours or so the H202 evaporates and becomes harmless so you don't have to make sure you get every last drop of it rinsed out like with bleach.

http://boards.cannabis.com/hydroponi...ng-system.html GL I just discovered this. Check it out. I love mine.
Weedhound Reviewed by Weedhound on . First Time DWC W/ Water Farm Buckets This is my first Bucket grow ever. I have done tables before and had great results Soil ect... Then I seen the excellent results People were getting out of 4 bubbler plants with LST. So I Just purchased 2 8 pack Water Farm Bucket Systems. After 5 days I can see that I need to buy a stronger pump and more line cause I cut it all down. I'm running tap water 7.8 dropping it down to 5.8 to 6.3 W/ PH Down. I set up the system without washing the Hydrotone and balancing the PH level of it. I did Rating: 5