Carbon filters are one go use or the charcoal can be replaced?

Hi

Carbon filters have the posibility to replace the active carbon when they are aint working anymore or you need to buy the whole thing again?

it should be replaceable but then again i suppose it depends on iwhat u have

some brands sell replacement carbon. Try to choose a brand that offers that. I think phresh does. Go to a distributers site like sunlightsupply.com / hydrofarm.com and check first.

Thanks for the answers

I'm curious what some of the answers are going to be. I've heard from some growers that they can never repack their filters well and it's almost not worth it so they just replace them every year or so. If anybody has experience with fat filters I'd love to hear.