hello everyone i am having some ph issues I have a RO pump and i pumped some water into my RO tank about a week ago i have been having some ph problems in my nutrient tank as well.

Now my RO water is at 8.6 is this normal?

the water in my nutrient tank is very difficult to control i drop the ph down to 5.8 and the next day its back up to 7 i have been doing this everyday for about a week now and almost a full ph down later its still doing it.

Any ideas? is my ro pump fucked up? am i doing something wrong? any help is apreciated im confused at this point

the water out of my osmosis pump is at 8.0. that would explain the spike in the RO tank due to evaporation. Isnt RO water supposed to be at 7.0?

Yes, RO water should be 7. Your RO unit is defective and you most likely have hard water. I bet the ec is way up there too.

No RO water does not always have to be 7.0. Check this out it is about dissolved gasses in RO water and how it affects the final RO pH. http://www.freedrinkingwater.com/wat...ion2/ro-ph.htm
I have been to many fish stores to get RO water and none of them have ever been the same pH.

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If you are getting low ppm's out of your RO it is working properly. Most RO units do not adjust the pH. There are extra stages of filters you can add to do that though.

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nice guys thanks for the info. my ppm is looooow so its working. the ph coming out of the pump is 7.9 i just checked so it should be good right?

Yeah your water should be good. Just add the nutes and then slowly adjust for pH if needed. Most nutes will drop the pH into a good range. Just be sure to make small adjustments if adding pH down as it takes a few hours for it all to settle down and become steady.

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Water Question, RO, Distilled, pH

good info on water there

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Well your getting low ppm so your checking the right line. My first guess was that you were checking the waste line.

Is your PH meter accurate?

How old is the unit? Backflushing is pretty easy to do just by changing some hoses around.

8.6 seems way off to me. Generally as the membrane gets worse it will drop your PH. Low 6ish is the worst I have seen in a commercial application. Has your membrane ever dried out? Has your RO unit been sitting idle for a long period of time? These can cause a higher PH.

Ph meter is on point, the unit is about 3 weeks old. i just checked the ph on my tap water and its at 9. the unit is working due to the low ppm my tap water is coming at a really high ph. the ro ph is at 8 so im sure the unit is workig. it sat for maybee two weeks not in do u think the membrane coul dhave dried out?

how do you back flush