Changing RO membrane (2 Viewers)

[mittens]

Well dangit...I’ve never flushed a single filter. LOL.

Although I do bleed off the TDS creep for the first 90 seconds or 2 minutes. Does that count for a flush for all filters??

That being said...I always have zero TDS water on the other end.

May I ask a question as to what may get into the tank if the filters are not flushed even if we’re seeing zero TDS on the other end?

Or what exactly are we flushing out? It sounds like a good thing to do because just like Carbon and GFO has fines, I’m sure these new filters carry a bunch of junk that probably wouldn’t be good. It still has to make it through the DI stage right?

Preservatives


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[Reefahholic]

Preservatives


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Preservatives that affect my reef how?

 

[mittens]

Preservatives that affect my reef how?

In a no bueno kinda way


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[Reefahholic]

In a no bueno kinda way


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I need specific information. My brain doesn’t compute no bueno kinda way. It has to know and understand why.

 

[Reefahholic]

Ok so I flushed the carbon for 20mins, then went on to flush the membranes for an hour ... hope I did it right... tds says zero but I’m not sure I believe that since after i transfer that water to a bucket it says tds is 2, bucket was clean.

The bucket is leaching! Is it NSF?

 

[Reefahholic]

Maybe I should clarify... tds is zero coming out of the di... but once it travels through the 1/4” tubbing about 30’ and comes into my house it reads 2

The 30’ of 1/4” dead space is contaminated? Might be time to change it out.

 

[mittens]

I need specific information. My brain doesn’t compute no bueno kinda way. It has to know and understand why.

That is something you would need to call Spectrapure about. [emoji2369]


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[cigmin]

Just curious do you clear line first of old water then test tds?


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[gregg]

The 30’ of 1/4” dead space is contaminated? Might be time to change it out.

how would it get contaminated and shouldnt over time that contamination disappear? many gallons of water go through it each day. i guess i could replace it and see what happens... cant hurt.

 

[gregg]

Just curious do you clear line first of old water then test tds?


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good question but yes, i flush it was about an hour and then tested it, im gonna get the numbers @Buckeye Hydro asked for and see if he cant work his magic. He's the master at this kinda stuff so if he cant make it zero then im in trouble. everybody seems happy either way.

 

[SCUBAFreaky]

Maybe I should clarify... tds is zero coming out of the di... but once it travels through the 1/4” tubbing about 30’ and comes into my house it reads 2

This may be a dumb question, how are you testing the TDS coming out of the DI versus what is coming out of the end of the 30' line? Are you using 2 different testers or the same portable tester in both places?

 

[gregg]

This may be a dumb question, how are you testing the TDS coming out of the DI versus what is coming out of the end of the 30' line? Are you using 2 different testers or the same portable tester in both places?

I use the Hanna tds meter.

 

[steveb]

Your container is Poly and the tubing is poly correct? (polyethylene)

 

[Reefahholic]

how would it get contaminated and shouldnt over time that contamination disappear? many gallons of water go through it each day. i guess i could replace it and see what happens... cant hurt.

I don't know. I was just picking with you.

 

[Reefahholic]

Just curious do you clear line first of old water then test tds?


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Greg might have 30' of old water that's been sitting in there 3 months.

Honestly...that wouldn't be it. I had 50' of RODI line feeding my topoff. No elevated TDS going in. Even after not running the RODI for over two months.

 

[Reefahholic]

That is something you would need to call Spectrapure about. [emoji2369]


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I just contacted Spectrapure. Will have an answer to this question very soon. Stand by.

 

[Reefahholic]

Your container is Poly and the tubing is poly correct? (polyethylene)

That's a great question to ask. What is the material?

 

[gregg]

That's a great question to ask. What is the material?

standard ro tubbing and it dumps into a acrylic ATO storage container.

 

[Reefahholic]

standard ro tubbing and it dumps into a acrylic ATO storage container.

Well, it is good to go!