Is this normal?

[Kamreefer]

i just replaced my RODI filters and resin two weeks ago my resin is already halfbrown am i missing something?

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[Joe5688]

check your waste/clean water ratio. I was burning through DI like crazy and i adjusted it to 4:1 and now it last forever lol

 

[Kamreefer]

how do you do that?


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[#theMatrix]

http://www.chicagoreefs.com/forums/showthread.php/29215-Where-to-buy-Flow-Restrictor-locally/page3?highlight=Rodi+ratio

 

[Kamreefer]

Heres what i got i disassembled it followed this diagram and now i dont get water out of the ATSO to go into the DI Resin ? i made sure to see it say out?

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[Kamreefer]

help


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[Joe5688]

Damn I should have showed you mine today when you came over.didn't resize this was you who asked this question

 

[Kamreefer]

Damn I should have showed you mine today when you came over.didn't resize this was you who asked this question

Ha lol yeah i should have asked you would of been nice to see your setup. for now seems ok but lets see how long the resin lasts


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[beetlenut33]

Measure the TDS of the water going into the DI resin. It should be around 4 TDS. If it's higher, your RO membrane might be need to be replaced.


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[Kamreefer]

Good idea will do!


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[Kamreefer]

well not good it started at 40 then dropped to 14 so i guess it is the membranes


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[Kamreefer]

Jus a question can i go with a lower gpd Membrane replacement i only have a 90 and all i do is once a week 5g water change and fill my 10g reservoir?


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[beetlenut33]

Yes, you can change to a different GPD membrane, but you will have to change the flow restrictor accordingly. What is your flow restrictor currently rated for?


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[beetlenut33]

well not good it started at 40 then dropped to 14 so i guess it is the membranes


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You have to let it run a while to let the reading stabilize. Is 14 TDS the lowest it reached? Wait like 15 mins.


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[Kamreefer]

Yes, you can change to a different GPD membrane, but you will have to change the flow restrictor accordingly. What is your flow restrictor currently rated for?


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not sure is this it?


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[Kamreefer]

You have to let it run a while to let the reading stabilize. Is 14 TDS the lowest it reached? Wait like 15 mins.


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ya that was in like 5min ill recheck when i get bak home thanks!


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[Kamreefer]

So i rechecked and before hitting the DI the waters testing at 20-21tds? guess it is the membranes!?


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[Kamreefer]

i also realized im a dummy and had the flush valve open the first time i tested it


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[beetlenut33]

So i rechecked and before hitting the DI the waters testing at 20-21tds? guess it is the membranes!?


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20-21 TDS is the reason you are burning through your DI resin so quickly. My RO/DI filter is 4 TDS input to the DI resin, and 0 TDS output from the DI resin. My DI resin lasts well over a year.

How old is your current membrane? I would get a 75 GPD membrane and also get a 75 GPD flow restrictor so you are sure it is sized appropriately.

Also make sure your pre filters are in good shape (less than a year old).

 

[Kamreefer]

never replaced the membranes goin on a year and the prefilters are all new . The 550 flow restrictor should be enough right?


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