Hi bobrown. Do you mean run hot water through it and let it dry? I hate to get rid of these things and would love to reactivate it. Edit: I see you answered an earlier post. Thanks.Looking most excellent. Happy healthy is always good.
Looks like you have your transplanting skills down. Good job.
You can remove the cover on your filter. Thats there for when its set up
as an intake inside the tent.
After a year or so you can take the filter and run hot was thru it in the bathtub then hose it off outside. That will clean out the inside and re-activate the carbon. Still have to do this even if it's running as an intake instead of out take. A lot of folks don't know this and throw out an expensive filter.