>>Trash cans will work for storing good water and waste water, though the (typical) 6:1 ratio of waste water to good water demands multiple trash cans for the waste, or else a method of sending it to the garden or the drain.<< Waste water just means non-R/O water, right? I seem to recall someone used the waste water for other tanks. It might have been for African cichlids as I recall the message said that the waste water was hard. If that's correct, then you could set up 6 African tanks to every Apisto tank <bg>. Bill Vannerson McHenry, IL USA william_vannerson@ama-assn.org