Do I need to change my ro di filters?

Ryanrttu · 09/26/2014, 05:54 PM

Gone through 1108 gallons, my handheld tds meter is still reading zero but Im still new to this. How do you think these filters look? My rodi unit is supposed to tell you when to change filters I think but I haven't figured out to know that yet. About how long are highest things supposed to last before you change out the filters?

kmbyrnes · 09/26/2014, 06:09 PM

I have a BRS RO/DI as well.
Your resin appears to have changed to brown, indicating it is time to change.
What is your TDS reading?
I only have a 4 stage, but I just change all the filters/DI when it changes from blue to brown.

Ryanrttu · 09/26/2014, 06:09 PM

My tds is zero right now but yea I think I'm gonna go ahead and order that from BRS.

SFish · 09/26/2014, 06:14 PM

If your TDS is 0 out of the DI filter then it's still good. Don't worry about the color just the TDS reading coming out of the RO and the DI side. Who cares what color it is as long as the TDS out of the DI filter is 0. For the prefilters go off of pressure and Cl readings. If you put the pressure gauge before the RO filter you will see a drop when the prefilters start to plug. You can take Cl readings out of the waste water line of the RO filter. When the Cl reading goes up the carbon is used up. The Di may go bad soon but it's not bad yet so I would hold off on changing it just keep some DI resin on hand for when it goes bad. The RO filter should last two years or so if you have a flush kit that will make it last longer but again go off your TDS meter / rejection rate to tell you when to change the filter. I was told for mine that when it drops to around 95% to change the RO filter. You should be calibrating your TDS meters as well if your not doing so. Every month I do mine.

SFish · 09/26/2014, 06:43 PM

Quote:

Originally Posted by kmbyrnes

I have a BRS RO/DI as well.
Your resin appears to have changed to brown, indicating it is time to change.
What is your TDS reading?
I only have a 4 stage, but I just change all the filters/DI when it changes from blue to brown.

This is a waste of money. See other post. Also I've had my DI last longer then my prefilters before.

09/26/2014, 05:54 PM	#1
Ryanrttu Registered Member Join Date: May 2014 Location: San Francisco / North Beach Posts: 394	Do I need to change my ro di filters? Gone through 1108 gallons, my handheld tds meter is still reading zero but Im still new to this. How do you think these filters look? My rodi unit is supposed to tell you when to change filters I think but I haven't figured out to know that yet. About how long are highest things supposed to last before you change out the filters? __________________ Trigger ruby 36s sump, 20g QT, BRS rodi, APEX gold, (2) Vortech MP40's, lifereef in-sump skimmer, Eheim 1262 return pump, Tunze ATO, many brute trash cans Current Tank Info: None - taken down for time being

09/26/2014, 06:09 PM	#2
kmbyrnes Registered Member Join Date: Aug 2013 Location: Mesa AZ Posts: 2,055	I have a BRS RO/DI as well. Your resin appears to have changed to brown, indicating it is time to change. What is your TDS reading? I only have a 4 stage, but I just change all the filters/DI when it changes from blue to brown. __________________ 125g Mixed Reef 5/26/2015; 350 Butterfly Dominated FOWLR 11/26/2015 - 11/17/20217 & 07/31/18 to ??? ; 100g Mixed Reef 11/16/2013 to 06/16/2017 Current Tank Info: Too small

09/26/2014, 06:09 PM	#3
Ryanrttu Registered Member Join Date: May 2014 Location: San Francisco / North Beach Posts: 394	My tds is zero right now but yea I think I'm gonna go ahead and order that from BRS. __________________ Trigger ruby 36s sump, 20g QT, BRS rodi, APEX gold, (2) Vortech MP40's, lifereef in-sump skimmer, Eheim 1262 return pump, Tunze ATO, many brute trash cans Current Tank Info: None - taken down for time being

09/26/2014, 06:14 PM	#4
SFish Registered Member Join Date: Dec 2013 Posts: 2,062	If your TDS is 0 out of the DI filter then it's still good. Don't worry about the color just the TDS reading coming out of the RO and the DI side. Who cares what color it is as long as the TDS out of the DI filter is 0. For the prefilters go off of pressure and Cl readings. If you put the pressure gauge before the RO filter you will see a drop when the prefilters start to plug. You can take Cl readings out of the waste water line of the RO filter. When the Cl reading goes up the carbon is used up. The Di may go bad soon but it's not bad yet so I would hold off on changing it just keep some DI resin on hand for when it goes bad. The RO filter should last two years or so if you have a flush kit that will make it last longer but again go off your TDS meter / rejection rate to tell you when to change the filter. I was told for mine that when it drops to around 95% to change the RO filter. You should be calibrating your TDS meters as well if your not doing so. Every month I do mine. Last edited by SFish; 09/26/2014 at 06:53 PM.