RODI - when to change membrane, resin or catridge

bimmer01 · 01/29/2009, 01:25 PM

Is there an easier way to tell if I need to change the membrane, resin or cartidge of an RODI unit without a TDS meter or pressure guage? Maybe by its color or how much is left?

This is the RODI unit I have:
Bulk Reef RODI

greggnyce · 01/29/2009, 01:40 PM

I change mine every 6 months (cartridges) and my mebrane every year to year and a half. It really depends on the quality of the water source, how fast you will got through them. I think some tds meters are fairly inexpensive and well worth it, if it saves you from replacing the cartridges prematurely. Kind of pays for itself in time.

THE ROOK · 01/29/2009, 02:33 PM

Walgreens carries TDS meters next to their Brita Water pitchers. I believe they're under $15.00 .

It doesn't need to be the most accurate meter as your mainly looking for a large drop from the tap to the rodi water.

Skeptic_07 · 01/29/2009, 03:24 PM

here you go:

http://cgi.ebay.com/HM-DIGITAL-DM-1-...19129005r32924

01/29/2009, 01:25 PM	#1
bimmer01 Registered Member Join Date: Oct 2008 Location: Bayside, NY Posts: 229	RODI - when to change membrane, resin or catridge Is there an easier way to tell if I need to change the membrane, resin or cartidge of an RODI unit without a TDS meter or pressure guage? Maybe by its color or how much is left? This is the RODI unit I have: Bulk Reef RODI

01/29/2009, 01:40 PM	#2
greggnyce Registered Member Join Date: Jun 2006 Location: Bellport, New York Posts: 1,782	I change mine every 6 months (cartridges) and my mebrane every year to year and a half. It really depends on the quality of the water source, how fast you will got through them. I think some tds meters are fairly inexpensive and well worth it, if it saves you from replacing the cartridges prematurely. Kind of pays for itself in time. __________________ What you talkin about Mrs Lime. Current Tank Info: 120 gl oceanic tech, 30 gallon fuge, 40 gallon sump, Itech 200 skimmer, LED Lighting . Mixed reef.

01/29/2009, 02:33 PM	#3
THE ROOK Registered Member Join Date: Jun 2008 Location: Springfield, MA Posts: 2,100	Walgreens carries TDS meters next to their Brita Water pitchers. I believe they're under $15.00 . It doesn't need to be the most accurate meter as your mainly looking for a large drop from the tap to the rodi water.

01/29/2009, 03:24 PM	#4
Skeptic_07 Registered Member Join Date: Jul 2007 Location: lawn guy land Posts: 1,418	here you go: http://cgi.ebay.com/HM-DIGITAL-DM-1-...19129005r32924