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Sounds like I’ll just have to wait for the filters to come in. Appreciate it!The tap water will keep swinging because of the hydroxyl content, you can't change that. When the hydrogen exchanges in an acidic pH with nutrients the pH always returns to where it started when the hydroxyl is high. The starting pH of tap water is high to keep the water from leaching heavy metals into the drinking water. As long as you use treated water you can have problems with pH.
That’s too high for hydro.Im running a 20 gallon rdwc system and after adding in nutes it won't seem to drop ph. Its stuck at 7.0-7.4. Wondering if its some sort of buffer in the nutes. Im running Masteblend 3 part salts. Tried a new bottle of ph down and still nothing. Any thoughts?
Running tap btw until RO filters come in (240ppm)
I guess we better inform the thousands of growers out there that use tap water that it doesn’t work?The tap water will keep swinging because of the hydroxyl content, you can't change that. When the hydrogen exchanges in an acidic pH with nutrients the pH always returns to where it started when the hydroxyl is high. The starting pH of tap water is high to keep the water from leaching heavy metals into the drinking water. As long as you use treated water you can have problems with pH.
Opposite.Coming in late and not knowing the about the specific water treatment….
Do you think that a tub of water collected then allowed to “air” would see the pH drop. I guess, Only happens if the water treatment additives are somewhat volatile.
Like what?Correct.
I referring to any municipal added water treatment chemical(s) that when off gassed allow the pH to drift downward.
So what COULD be in tap water that offgasses and takes PH down with it. In any community?Have no idea. I don't live in that community. Maybe someone in this vast network has experience.
As I just happen to have a new 13g bucket full of fresh city tap water I can confirm after a week of sitting with half the lid open it’s gone from about PH 7.43 to PH 7.87. So it does get higher.Opposite.
Allowing offgasing of CO2 causes PH to go up.
Actually very few municipalities use actual chlorine any more. Almost all, if using a chorine based sanitizer will opt for Chloramines specifically because they are more stable and do not evaporate like Chlorine.As I just happen to have a new 13g bucket full of fresh city tap water I can confirm after a week of sitting with half the lid open it’s gone from about PH 7.43 to PH 7.87. So it does get higher.
Does chlorine lower PH as it evaporates? Even though after C02 off gassing raises PH again.
I've observed this.Opposite.
Allowing offgasing of CO2 causes PH to go up.
RO does not have a buffer to resist ph changes. That part is normal.After using RO water the ph seems to drop faster with less PH down used. It also stays pretty consistent.
Now I'm having trouble with brown algae buildup on the walls and stones in the system but it seems more appropriate to make another thread for help on that
I’ll definitely take a look. I have pictures of the slime posted on my other thread if you’re interested.RO does not have a buffer to resist ph changes. That part is normal.
I’m gonna guess what you are seeing is diatoms. If so don’t worry they will die off once the food source is gone. Google some pics of diatoms to compare. They will not hurt anything
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