How often do you change you DI?

tangtang clown · 09/20/2010, 09:37 AM

I have an RO/DI setup. TDS leaving the RO is about 7 and TDS leaving the DI is 0. Recently replaced the RO filters, but I have had the same DI canister for over a year. Does the DI need to be changed even though it is reading 0?

john90009 · 09/20/2010, 10:19 AM

um over time usually the di will go bad faster then the other filters. if its reading zero and its the color changing kind and it hasnt changed color then leave it.

yerboy · 09/20/2010, 10:24 AM

or recalibrate your tds meter. I change my di canisters about once a month once TDS hits 1ppm

cdamiano · 09/20/2010, 10:29 AM

The first stage which is usually the sediment prefilter should last 1 - 2 months. The second stage, usually the carbon filter, should last about 2- 3 months. The cartridge with the DI resin should last about 6 months. If you are changing your DI cartridge every month, that sounds unusual.

cdamiano · 09/20/2010, 10:32 AM

If the reading after the DI cartridge is 0, then the DI cartridge doesn't need to be changed.

yerboy · 09/20/2010, 10:46 AM

I dont think we should try and set a time limit standard to how long filters or DI should last. You may only filter 100 gallons of water in a month while i may filter 500 gallons.

tangtang clown · 09/20/2010, 11:28 AM

Good point, I forgot to mention that I only use RO/DI for top off water/evaporation. I I'm not sure how much water has actually been filtered, but I store my Top off Water in a 55gallon rubbermaid trashcan and I fill every 2-3 weeks. My current setup is a 125 with 30 gal sump and 10 gal fuge. The reason I am asking is because lately I have Cyano and I am trying to locate the source with out dropping a ton of green backs. I have a decent load and I have an awesome skimmer. Just added a new batch of Cheato/Macro b/c the other disappeared after I "tried" a new fuge light.

The DI resin was brand new when I got it .

solitude127 · 09/20/2010, 04:19 PM

Here's a good thread a while back about filters.
http://www.reefcentral.com/forums/sh...readid=1415770

09/20/2010, 09:37 AM	#1
tangtang clown Registered Member Join Date: Mar 2008 Location: The DUB, NC Posts: 2,711	How often do you change you DI? I have an RO/DI setup. TDS leaving the RO is about 7 and TDS leaving the DI is 0. Recently replaced the RO filters, but I have had the same DI canister for over a year. Does the DI need to be changed even though it is reading 0? __________________ Mind over chatter.

09/20/2010, 10:29 AM	#4
cdamiano I like Fuzzy Sticks Join Date: Dec 2005 Location: Long Island, NY Posts: 1,353	The first stage which is usually the sediment prefilter should last 1 - 2 months. The second stage, usually the carbon filter, should last about 2- 3 months. The cartridge with the DI resin should last about 6 months. If you are changing your DI cartridge every month, that sounds unusual. __________________ ----- Chris -----

09/20/2010, 10:32 AM	#5
cdamiano I like Fuzzy Sticks Join Date: Dec 2005 Location: Long Island, NY Posts: 1,353	If the reading after the DI cartridge is 0, then the DI cartridge doesn't need to be changed. __________________ ----- Chris -----

09/20/2010, 11:28 AM	#7
tangtang clown Registered Member Join Date: Mar 2008 Location: The DUB, NC Posts: 2,711	Good point, I forgot to mention that I only use RO/DI for top off water/evaporation. I I'm not sure how much water has actually been filtered, but I store my Top off Water in a 55gallon rubbermaid trashcan and I fill every 2-3 weeks. My current setup is a 125 with 30 gal sump and 10 gal fuge. The reason I am asking is because lately I have Cyano and I am trying to locate the source with out dropping a ton of green backs. I have a decent load and I have an awesome skimmer. Just added a new batch of Cheato/Macro b/c the other disappeared after I "tried" a new fuge light. The DI resin was brand new when I got it . __________________ Mind over chatter.

09/20/2010, 04:19 PM	#8
solitude127 Proud user of IO Salt! Join Date: Jun 2006 Location: Torrance, CA Posts: 9,136	Here's a good thread a while back about filters. http://www.reefcentral.com/forums/sh...readid=1415770 __________________ Mike <)))>{ <)))>{ <)))>{ <)))>{ ReefKeeping.com TOTM Nov 2012 Socalireefs Featured Reef Oct 2011 Current Tank Info: 603020, 8x54 ATI Powermodule, ReefBrite XHO, ATB Elegance 200, Aquamaxx CTech CaRx, Ecotech Vortechs, Apex Controls, WM Ecobak powered. RedSea Reefer 170, MP10, Apex Jr, Ecotech Radion XR15, Aquamaxx WS-1

09/20/2010, 10:19 AM	#2
john90009 Registered Member Join Date: Feb 2008 Location: Brick Posts: 985	um over time usually the di will go bad faster then the other filters. if its reading zero and its the color changing kind and it hasnt changed color then leave it.

09/20/2010, 10:24 AM	#3
yerboy Registered Member Join Date: Aug 2007 Location: Huntsville AL Posts: 275	or recalibrate your tds meter. I change my di canisters about once a month once TDS hits 1ppm

09/20/2010, 10:46 AM	#6
yerboy Registered Member Join Date: Aug 2007 Location: Huntsville AL Posts: 275	I dont think we should try and set a time limit standard to how long filters or DI should last. You may only filter 100 gallons of water in a month while i may filter 500 gallons.

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