I have seen a few different types of coco bricks being sold as 'reptile bedding/substrate'. Most of the bricks mention that plants love to grow in coco, etc.. I am FAR from a hydro shop, and if I order online, I will pay $20 to ship $30 worth of coco (don't have my $250 order together yet growco...). I was wondering if anyone has used these bricks? I am worried that they may not be flushed fully, would I be ok just to flush em myself with a bunch of (warm) water? They aren't any cheaper @ $4-5 per brick, but they are very convenient if they are usable. I had to throw some pro-mix in my coco mix, as I am running low. At least the Agway knew what the hell I was talking about and offered to order some. The looks that I got at the high-end garden center were priceless. Try it some time. Go to a garden center that sells as much garden furniture as it does plants and ask for coco and/or worm castings. Like I had 3 friggin heads!! I did find that they carry ALL of the espoma line, and most of the neptune's harvest stuff (bottles anyway). The girl said, "worm castings, what are you trying to grow?" I tell her tomatoes, peppers, cucumbers, she picks up some ol 10-20-20 and starts telling me how good it is.....