I purchased mine at a LFS. It is made by Spectrapure. It was $134 and can make up to 25 Gallons per day. They have systems that can make 180 Gallons per day. The LFS is
http://www.saltycritter.com.
The Float kit I purchased from
http://www.spectrapure.com There part number is
FLC-10 it was $65. They recommended using a Rubbermaid 30 Gallon plastic Garbage can to store the water. Spectrapure also has kits to automatically refill your aquarium with RO when water evaporates. I first bought the RO unit and filled gallon water jugs, then I used a 5 Gallon water jug. After several months. I saved enough to buy the the float kit, so you don't have to do it all at once. Just buy the RO unit and in 18 months it will have payed for itself ($135 not including your time and gas driving back and forth to the LFS). The specifications of my R/O unit are listed below. Hope this helps
Joe
LINE PRESSURE REVERSE OSMOSIS (RO) SYSTEMS
Three-Stage MaxPure™ MPRO Systems
Full-Size, Wall-Mount RO Water Purification Systems for the Serious Hobbyist and Small Business
RO pure water at an economical price
High-silicate removal Reverse Osmosis Membranes
High-efficiency MicroTec™ 1 micron Sediment Pre-Filter
High-capacity Carbon Block Pre-Filter
(9,000 gallon chlorine removal)
Clear filter housings
Filter wrench and garden hose adapter
Dimensions: 14" x 6" x 15