Rodi

gprdypoo04 · 05/02/2020, 09:07 AM

I have two DI canisters on my filter and wondering if its normal for my last DI to be depleted first? Somehow I think I've got things screwed up here.

Vinny Kreyling · 05/02/2020, 09:35 AM

Sounds like it.

outssider · 05/02/2020, 04:01 PM

whatever one is first will deplete first. starts changing color at the bottom and slowly progresses upward

gprdypoo04 · 05/02/2020, 04:20 PM

The DI that is first is not depleting first. Any reason why this is?

outssider · 05/03/2020, 04:57 PM

maybe the resin in the second one has somehow been compromised.....??

gprdypoo04 · 05/03/2020, 05:13 PM

I've had this dual DI for years and as far as I can remember it's always been like this. Maybe I'll switch them around again

gprdypoo04 · 05/04/2020, 01:33 AM

When u have two DI canisters side by side why would it NOT bypass the first and use the second since it's the last resin to go through. Again WHY would it use the DI resin in the first canister when it has to flow through the last canister of resin therefore using it.

Vinny Kreyling · 05/04/2020, 07:52 AM

The unit should be plumed- Sediment - carbon - membrane - DI 1 - DI 2.
2nd DI can be for a different removal. My DI 2 is for silicates.

gprdypoo04 · 05/04/2020, 08:02 AM

I've got the same DI resin in both canisters.

Vinny Kreyling · 05/04/2020, 08:12 AM

Check to make sure hoses run in the order I posted.
Perhaps they got mixed up?
Doubt it though because hoses are usually only the length needed.
If they are correct then time to ask an expert, like Buckeye Hydro or Spectrapure.

gprdypoo04 · 05/04/2020, 08:31 AM

Hoses should be fine but later today I will go and thoroughly check it out. This is driving me nuts!

e7bin · 05/11/2020, 12:29 AM

I had this problem and it wound up being the resin wasn't packed completely from brs, which allowed channeling to occur, killing my resin down stream.

gprdypoo04 · 05/11/2020, 12:52 AM

I'll check that but i doubt that's my problem

05/02/2020, 09:07 AM	#1
gprdypoo04 Registered Member Join Date: Jun 2004 Posts: 389	Rodi I have two DI canisters on my filter and wondering if its normal for my last DI to be depleted first? Somehow I think I've got things screwed up here.

05/02/2020, 09:35 AM	#2
Vinny Kreyling Registered Member Join Date: Nov 2002 Location: Miller Place, NY Posts: 7,206	Sounds like it. __________________ 250 gallon mixed reef, 2 Reefbreeder's Photon V 2, Deepwater BLDC 12, DAS EX-3 Skimmer, MTC mini cal, 2-3/4" Sea Swirls, Aquacontroller & 6 Tunze pumps.

05/02/2020, 04:01 PM	#3
outssider Registered Member Join Date: Nov 2009 Location: Reseda, Ca. Posts: 1,717	whatever one is first will deplete first. starts changing color at the bottom and slowly progresses upward __________________ Please don't feed the bears because the bears will become dependent on free handouts and forget how to take care of themselves …... Current Tank Info: 75 Gal. Mixed reef mostly sps

05/03/2020, 04:57 PM	#5
outssider Registered Member Join Date: Nov 2009 Location: Reseda, Ca. Posts: 1,717	maybe the resin in the second one has somehow been compromised.....?? __________________ Please don't feed the bears because the bears will become dependent on free handouts and forget how to take care of themselves …... Current Tank Info: 75 Gal. Mixed reef mostly sps

05/04/2020, 07:52 AM	#8
Vinny Kreyling Registered Member Join Date: Nov 2002 Location: Miller Place, NY Posts: 7,206	The unit should be plumed- Sediment - carbon - membrane - DI 1 - DI 2. 2nd DI can be for a different removal. My DI 2 is for silicates. __________________ 250 gallon mixed reef, 2 Reefbreeder's Photon V 2, Deepwater BLDC 12, DAS EX-3 Skimmer, MTC mini cal, 2-3/4" Sea Swirls, Aquacontroller & 6 Tunze pumps.

05/02/2020, 04:20 PM	#4
gprdypoo04 Registered Member Join Date: Jun 2004 Posts: 389	The DI that is first is not depleting first. Any reason why this is?

05/03/2020, 05:13 PM	#6
gprdypoo04 Registered Member Join Date: Jun 2004 Posts: 389	I've had this dual DI for years and as far as I can remember it's always been like this. Maybe I'll switch them around again

05/04/2020, 01:33 AM	#7
gprdypoo04 Registered Member Join Date: Jun 2004 Posts: 389	When u have two DI canisters side by side why would it NOT bypass the first and use the second since it's the last resin to go through. Again WHY would it use the DI resin in the first canister when it has to flow through the last canister of resin therefore using it.

05/04/2020, 08:02 AM	#9
gprdypoo04 Registered Member Join Date: Jun 2004 Posts: 389	I've got the same DI resin in both canisters.

05/04/2020, 08:12 AM	#10
Vinny Kreyling Registered Member Join Date: Nov 2002 Location: Miller Place, NY Posts: 7,206	Check to make sure hoses run in the order I posted. Perhaps they got mixed up? Doubt it though because hoses are usually only the length needed. If they are correct then time to ask an expert, like Buckeye Hydro or Spectrapure. __________________ 250 gallon mixed reef, 2 Reefbreeder's Photon V 2, Deepwater BLDC 12, DAS EX-3 Skimmer, MTC mini cal, 2-3/4" Sea Swirls, Aquacontroller & 6 Tunze pumps.

05/04/2020, 08:31 AM	#11
gprdypoo04 Registered Member Join Date: Jun 2004 Posts: 389	Hoses should be fine but later today I will go and thoroughly check it out. This is driving me nuts!

05/11/2020, 12:29 AM	#12
e7bin Registered Member Join Date: Mar 2014 Location: Lakewood Ohio Posts: 67	I had this problem and it wound up being the resin wasn't packed completely from brs, which allowed channeling to occur, killing my resin down stream.

05/11/2020, 12:52 AM	#13
gprdypoo04 Registered Member Join Date: Jun 2004 Posts: 389	I'll check that but i doubt that's my problem