FWIW, at those times when I have an R/O unit in continuous operation, I run the waste water over my worm container. I use the blue, nesting worm keeper box and drill a few holes a bit below the rim of the outer box so that water drains out instead of overflowing, and keep it right in the sink with the waste water hose running into it. Worms kept like this are amazingly healthy and will live for weeks and weeks. They grow... which puzzles me because I don't feed them (actually, their growing kinda makes me wonder what's in my water supply!). The only caution is that when the carbon pre-filter on the R/O is replaced, the waste water is unsuitable for worms for about a day... it becomes so alkaline that it can kill the worms in a matter of minutes. When I've kept worms in the fridge and just rinsed them a couple of times a day, I found they'd do better if I added a drop of dechlorinator after I rinsed. They are probably my favorite food after mosquito larvae and live bloodworms... and the fish like them quite well, too! Martha ------------------------------------------------------------------------- This is the apistogramma mailing list, apisto@listbox.com. For instructions on how to subscribe or unsubscribe or get help, email apisto-request@listbox.com. apisto-digest@listbox.com also available. Web archives at http://lists.thekrib.com/apisto