Whats good DGC,
I notice that when I pH down my Remo nutes, or even my plain water, for my coco. It drops 10-20 ppm? If I need to pH down my little rez over 3 days in a row it may drop a total of 30 or so PPM. Are those missing ppm anything to be worried about? The same happens to my water. Is it maybe safe to assume what ever my pH down is diluting, it’s just out of my starting water or am I way over thinking….. all of this for nothing?
Very interesting and an astute observation. Possibly carbonate in your water source reacting with the acid. Co2 gas is given off and might account for your change in ppm. Or certain parts(per million) combining to form a bigger part(per million), 2 parts turning into 1. I wouldn’t worry about it, just chemical reactions happening. I like your thoroughness with the grow.
Agree with Justcoolin on your diligence and attention to detail. I also agree that the amount lost is so small that it is not a worry.
This relates to another recent question about EC vs PPM pens. Your PPM pen is measuring the EC and doing an estimation to show you a PPM reading. Changing the pH changes the EC and thus your PPM reading. The reading will also fluctuate with temperature. Doesn’t seem like much to worry about. What do the instructions say about the accuracy of your pen in the first place?
-TogetherMeow
Thanks for the responses!
I was going to mention that but thought maybe too much, but Bluelab ppm pen and H&M PH200 (the one that reads like 6.22ph, and I calibrate both the 1st of ever month).
I just have a calender I use for notes. Each time I write PH/PPM per plant, using Remo so it’s the same ML everytime so no need to really add.more than that too the notes (wattage changes and lihjt height too). So basically whatever the original rez is at I’m pretty safe assuming the last plant is getting the same ppm still?
1st time growing clones I took and in flower (week 4). And again like last time noticed 1 pheno doesn’t like as much ppm as the others. So now I’m trying to do like like 20-30ppm less and seems to be liking it.
So for a month I’ve been making a 2 gallon rez in 5 gal bucket. Not PH the rez. Scoop out 4-6 cups then PH that for each plant that needs water (depending on each pot dryness, either at lights on, mid day light, or 4 or the absolute latest 3 hours b4 lights out, but only when it’d be worse to wait to lights on). Just PH every pot watered out the rez basically.
I may be over thinking things but damn it’s fun.
Yes I’ve noticed what you are mentioning. Straight cold out the tap vs 24 hours later at room temp will definitely affect both my water and PH readings at different times👊.
I always fill a 5 gal bucket almost full, let it rest for 24-36 hours. Always ends up at around 68-71° at use, low 8s in PH.
Thanks so much for response🙏🤙🍻💨
I also have noticed how PH is higher when water is colder. Anyone have an idea why?
I have also seen slight variations depending in the vessel I mix in. When I was keeping water out in the garage to chlorine off it would get super cold so I had to heat it back up to feed. I noticed that my EC and pom were slightly different in the aluminum taurine than a five gal bucket. Science man!!!!
I meant EC and PH
Temperature does have an effect on pH as cold water holds more oxygen and less hydrogen which raises pH. High temperatures hold less oxygen and more hydrogen lowering pH.
That is pimp Jmystro knowledge. Thanks for explaining it. It got to a point where I was trying to determine the perfect temp and perfect metal to heat it in and recording all the different EC, PPM and PH’s. It was super interesting but a major hassle. Eventually I just heated in whatever vessel I had and poured into the 5 gal buckets for mixing and readings. Thanks again Mystro!