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I found the test strips to be plenty accurate enough.
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The one I got? It says thisI found the test strips to be plenty accurate enough.
Hasn't the waste water already been through the membrane?I'd try them on tap water, RO/DI waste water (= water in front of the RO membrane) and on the RO/DI final effluent.
Hasn't the waste water already been through the membrane?
I added a tee/valve to take a sample right after the last carbon, before it hits the membrane at all to make sure I don't have chlorine damaging the membrane.
Ok, I assumed since the wastewater has significantly higher tds than the tap, it was in contact with the membrane and contained what was removed when the water was filtered.No, wastewater is premembrane.
I always thought wastewater meant the waste of the membrane.No, wastewater is premembrane.
I will send you a link to what I order... when I find it, lolI always thought wastewater meant the waste of the membrane.
I just call premembrane: water that passed through sediment and carbon filtration.
I found a carbon block on Amazon, but I don’t know if it’s good for my needs. I’m trying to find the share button, but they don’t have it anymore. I need to look harder.
It's the AquaFX chloramine blaster. I use 2.I will send you a link to what I order... when I find it, lol
Ok, I assumed since the wastewater has significantly higher tds than the tap, it was in contact with the membrane and contained what was removed when the water was filtered.
Thanksi think we have a misunderstanding. We are saying the same thing.
To me, premembrane means water on the tap water side of the membrane. That is both water ready to flow through the RO membrane, and wastewater that never does.
Water after passing through the RO membrane would be called postmembrane.
I found that two carbon blocks were still inadequate. I was having to change the carbon more often than I liked so I added a third. After I installed a second membrane and booster pump I had to go to 5 carbon blocks.
The recommendation for chloramine removal is a minimum 5 minutes of contact time with GAC.
I used a Hach colorimeter to measure levels that would still be toxic to fish but not detectable by other methods. The limit for DPD methods is 0.02 mg/L but I doubt the color wheel test (which I also have) can go that low since, to the human eye, it looks as crystal clear as the control.
Won’t it build up over time?But to be fair, if you had 0.02 ppm chloramine in top off water, and added 1% daily top off, the tank would never get over 0.0002 ppm. That sounds like an excessively low level to be concerned with.
But to be fair, if you had 0.02 ppm chloramine in top off water, and added 1% daily top off, the tank would never get over 0.0002 ppm. That sounds like an excessively low level to be concerned with.
But wastewater is what washes the contaminants from the membrane, so doesn't that entail it coming in contact with it?i think we have a misunderstanding. We are saying the same thing.
To me, premembrane means water on the tap water side of the membrane. That is both water ready to flow through the RO membrane, and wastewater that never does.
Water after passing through the RO membrane would be called postmembrane.
I do not think it will accumulate significantly in a reef tank. Too many things to react with. It reacts with bromide to produce other oxidants, not unlike ozone, and like most oxidants, reacts with organics (dissolved, tissues, detritus, etc.)Won’t it build up over time?
But wastewater is what washes the contaminants from the membrane, so doesn't that entail it coming in contact with it?
I'm not trying to be difficult, just wondering if I really need to be taking a water sample prior to the membrane.