the easiest way imo to wash your medium, be it coco or hydroballs, is to fill it into pots and rins those pots through with water if you dont have a draining table take them to the sink or bathtub or take a bucket and put to planks on it which can support the pot of coco then just add water from the top till the run off is how you want it to be.
hey Mitch whats up with the pm system? seems i'm out of the loop here
gaius, your right but i have a slight variation for ya. i rinse all my coco/hydroton/dirt in a 15 gallon smart pot in the shower. With compressed bricks i just stand it upright and turn the shower on for 30 mins, when i come back its flushed, expanded, and ready to be precharged with nutes. another benefit of this is that you dont have all the little pieces running out the bottom holes in the plastic pots which is especially annoying with hydroton!!! The GH coco bricks expand to 15 gallons so the 15 gallon smart pots is the perfect size for them, if you wanna rinse in a rubbermaid the smart pot becomes the perfect strainer.