I bought a used rodi unit from a guy and said it hasn’t been used much well I tested my water and i got 11 tds so I ordered all new filters di resin and a ro membrane. The di resin has only changed colors about a 1/3 of the way. Should I go ahead and change it or wait till the rest has changed colors? Also once I change everything out how long should I let it run before I get good water? I ordered a tds meter but didn’t realize it’s coming from China so I don’t have it yet. I’ll probably take a sample by a lfs to make sure I have 0 tds.
Rodi question
- Thread starter Juice780
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AllSignsPointToFish
"No Longer The Guy Without FaceBook"
There's no reason to throw out the resin if it's not depleted. I only purge enough water through the system to ensure there is no visible tint from activated carbon dust.
How long did the ro/di system sit idol? It's advisable to flush water thru your system at least every 2 weeks, even if not making water. If the system sat idol for a long time, i would change out all of the filters, including di resin. Also, if the system doesn't have a flush valve, it is highly suggested to get one; your filters will last longer. gl
AllSignsPointToFish
"No Longer The Guy Without FaceBook"
How long did you let the water run before you tested 11 TDS?
I make water for my auto top off and water change every week and have been battling algae and I think this is where it coming from. I’ll leave the di resin that’s in there for now and just change the filters and membrane.
AllSignsPointToFish
"No Longer The Guy Without FaceBook"
I'm sorry. What I meant was, how long did you let the water run out through the system before sampling for TDS?
Also, what kind of container did you use for the sample?
AllSignsPointToFish
"No Longer The Guy Without FaceBook"
Whenever I start making DI water, there is a surge of TDS that takes a few minutes to abate. The surge is longer right water filter changes or other maintenance.
I have a TDS meter on my water unit and a portable $10 unit I picked up off of Amazon for spot checks or troubleshooting. I wouldn't go crazy with changes until you can confirm that reading your got the from the fish store.
I have a TDS meter on my water unit and a portable $10 unit I picked up off of Amazon for spot checks or troubleshooting. I wouldn't go crazy with changes until you can confirm that reading your got the from the fish store.
Hugo’s_Reef
Active Member
What about the RO membrane will that go bad if not in use or if left without flushing for a couple years ??
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