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#1
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![]() So I didn't have a tank running for about a year so and now I have my little biocube up and going. However I just decided to check the tds coming out of the rodi and it is sitting at 10 ppm whereas even the tap water is only 6 ppm. So do you guys think maybe the di membrane had dried out while it was sitting? And if so would I have to replace all the filters or just the di? The crappy thing is that I already have my tank running with clowns and snails lol.
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#2
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![]() i find it hard to believe your tap water is 6 ppm, we have good water here and it is 180 ppm, i don't think your TDS meter is correct.
you want 0 anyway
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Crap happens, that's why they sell toilet paper in 48 roll packs! |
#3
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![]() It all depends on where you live, here in Langley, 1 city away from abbostford, my TDS is at 5-13 depending on how much rain we get, TDS checked with 4+ tds meters. BC water is surprisingly good, thats why some get away with tap water for softies and LPS.
as for the RODI unit, did you backflush it? is there a restricting valve for the waste water on the unit that's fully closed? |
#4
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![]() Did you change any of the plumbing? If not, then run 5-10 gals through it and test again.
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#5
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![]() Quote:
my TDS is 8 after a 1 micron particle filter, a 5 micron carbon block, a catalytic GAC canister, a 1 micron carbon block and a spectapure RO membrane.
__________________
Crap happens, that's why they sell toilet paper in 48 roll packs! |
#6
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![]() As Eugene said, backflushing may help.. and maybe let it run for a couple of hours.
I just checked my TDS out of the tap and I'm at 6 right now. Yes we have pretty good water here out west. It also rains a lot so we get a lot of water. Your RO membrane should last for a few years out here. I change my DI after about a year or so. Can you check your ppm after the RO and before the DI? |
#7
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![]() Quote:
like everyone else suggested you might need to flush the system (by pass the RO membrane) if the carbon in your pre-filters are new it'll cause your TDS to go up, and check for any blockage in the waste line, I had tried to get 0.5:1 waste to RODI ratio out of my unit before by restricting the waste water and instead of doing what I wanted it to do it did the opposite (should have been bluntly obvious that it wouldn't work but I thought I'd try anyways) |
#8
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![]() I've been in the hobby @ 2 years and have changed all my filters and resin at least 5x and my membrane 1x, I run a 9 stage RODI and change the filters and resin when TDS reads 1ppm
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Crap happens, that's why they sell toilet paper in 48 roll packs! |
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