I do, as well. Their tanks look great, and they sell it at a reasonable price. I buy the same water they mix for their tanks. They have an RO/DI system, and I don't. I have filtered water, but not sure it is good enough to mix my salt. I use the water at home for top-off, do changes with the water I get from the LFS. It does get expensive over time, so I need to determine whether my GE Smartwater system is good enough for my FOWLRs (
http://www.geappliances.com/smartwat...fs.htm?GXSL55F) or if I need to install an RO/DI.