Hi, I just recieved this method on increasing RO water production from one of my marine aquarium lists: 'I came across a neat strategy for increasing the output of RO units, and I thought I'd pass it on. Tell me if you've heard this one before. Take a 5 gallon bucket, fill it with warm water (or toss in a heater), and run about 50 feet of high pressure turbing from the spigot to the RO unit - coil the 50 ft. length into the bucket of warm water. Voila - a heat exchanger. Around here where the water is about 45 degrees at 80 psi, this trick tripled my output...' I guess this makes sense since most gpd rate on ro units are dependent on water tempurature, water pressure & the amount of solids in the water. SpectraPure rates their units using the following parameters 77 degree water, 60 psi and 500 TDS. So I guess if you change any of these (temp & pressure up and tds down) water production will increase. Just thought I'd share. Sincerely, Victor Eng Vancouver, British Columbia, Canada engfam@axion.net ------------------------------------------------------------------------- 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. Search http://altavista.digital.com for "Apistogramma Mailing List Archives"!