If your looking to reuse, or even prolonged use... coco isn't what u want... coco is an organic medium and will eventually break down and release P or K... I've answered this before but still haven't looked up which it releases as it breaks down, P or K... but it's an awesome medium if that's what your planing on using but it's not an inert medium like hydroton or grow stones... even perlite; even though it's inert n ph neutral, if your using pumps or anything where your solution is flowing through small hoses (even 1/2" isn't that hard to clog) like flood and drain systems...basically any kind of automated system, perlite isn't the one either... I literally planned my whole grow using f&d tables around using perlite and even stocked up on it...just to find out I couldn't use it...
Suck it up (for lack of a better term...) and just rinse the shit out of your hydroton or grow stones... I stab a bunch of holes in the bottom 1/4 of the bag, cut the top open and put the bag in my tub and get the tub spout or somewhere else you can put a hose in the bag and just let er' rip for 10-15minutes so the majority of dust comes off, pull it out, shake the bag around...throw it under the faucet/hose again until u don't see any more... fill a Rubbermaid with 5.0 ph'ed water (enough so you aren't gonna over fill it when u dump the hydroton in) and dump the hydroton in and let it soak for 24 hours...
I use an old submersible pump to keep the water moving... then I use a strainer with a handle and take a scoop at a time and give each scoop a little shake and dump it into a clean container without beating it up to bad (the more u beat it up the more dust you'll end up with)...
But there's not much else that works as well and is as reusable as hydroton... I use a mix of hydroton and the larger grow stones... no complaints other than the one you made, the dust sucks balls but there isn't too many other things that work as well and don't decompose like coco or any other organic medium...