Quote Originally Posted by Big_Pun View Post
another tip i got from marc levenson was to purge water berfore di, this makes di last so much longer. the newer digital tds meter in his video is great i picked one up at macna and its very accurate.

http://www.reefaddicts.com/content.p...thy-of-concern



HAD TO UPDATE THIS THREAD AS THE LINK CHRIS POSTED WAS A GREAT TIP!!!!!.....


I have been doing this for awhile after he posted the link and its amazing how high the TDS is coming out of the membrane for a few minutes..... FOR me, it starts around 120, then drops to 6 or under within a gallon.....

within that gallon you are saving your DI RESIN from having to eat up all that TDS, which extends the life of your RESIN.... I sometimes bottle the water in gallons and store in the fridge for my own consumption...... IT A WIN WIN in my book....