Rodi problems

[thatmanMIKEson]

Tds is 387 ---415 coming in and 108 after membrane

Check to make sure you have the correct pressure going into the membrane, but more importantly make sure its seated good and the correct membrane because those numbers sound off or like its leaking past your membrane.

And verify tds meter is correct try switch positions of the meters see if it reads the same .

Those are both high, incoming is high i would have a dual membrane for that . But even still with a 98% rejection rate that is still to high

 

[Woodyman]

Yes 30 min is excessive, just talking about a purge, but thats in total from my starting flush to producing storage water.

I flush for probably 5_10 min with just normal water pressure thre the sediment filters and carbon blocks to flush weeks of standing water.

Then I put pressurized water thru the r.o membranes with the bypass filter until my first tds meter drops to about 10 tds then I engage the bypass off, and run thru the membrane and let that resaturate for about 10 min then I will take a chlorine and chlorimines test I then if its passable with flow thru my 4 d.i resins until all old water trapped in those are flush out which take about 10 min maybe.

Then I start capturing water that I save.

So yes to your answer 30 min for a flush is excessive but, thru the steps I outlined maybe my process is different then your testing but its how I treat my water, and how I feel comfortable. I replace all my filters regularly and way before needed just another thing I do that testing "disproves"

Testing doesn't disprove anything about your procedure. Is it excessive, yes, is it harming anything other than your wallet? No. Again not a bad thing filters are relatively cheap in the scheme of all things reefing.

Changing early is not a 'bad' thing, wasteful maybe, but not 'bad' from a production standpoint.

Personally I'd rather everyone change early vs to late. So if you're not into monitoring and testing of the various stages of your RO/DI system I say change early this way you eliminate potential problems before they occur.

 

[Woodyman]

Check to make sure you have the correct pressure going into the membrane, but more importantly make sure its seated good and the correct membrane because those numbers sound off or like its leaking past your membrane.

And verify tds meter is correct try switch positions of the meters see if it reads the same .

Those are both high, incoming is high i would have a dual membrane for that . But even still with a 98% rejection rate that is still to high

If you run dual with that high of an incoming TDS it would be preferred to run your membranes in parallel vs in series.

It will prolong the life of the second membrane when done in parallel.