reservoir temp vs. Ph ?

[drsmoke69]

just wondering if Ph levels change in a nutrient reservoir when the water temperature changes. any thoughts on this would be greatly appreciated, thanks.

i started pre-mixing my nutrients in a 5gal bucket with air stone and circulation pump. i use R/O water and grow in cocco, and hand water twice a day. i adjust my Ph right before i feed in a separate 1 gallon jug.

 

[ydijadoit]

Hey Doc, Welcome!
I don't have any information on temp affecting PH, but aeration does. I learned that a long time ago in water school, for hot tub repair.
I don't remember the specifics, but if you google "Hot tub ph change aeration", or something like that, you may find some answers.
Regards

 

[drsmoke69]

thanks man,
this site is great! so much good info on here.

i do have my air pump turned all the way up and it creates a foam on top of the reservoir, kind of like a hot tub would. i'm going to turn it down. i just noticed that the submersible water pump that i use for circulation heats the water a little, thought that might effect the ph but wasn't sure.

instead of adjusting the ph of the nutrient mix in the 5gal bucket reservoir i adjust each feeding separately, only to keep from adding more and more ph down to the reservoir. any thoughts on this technique? i use r/o water from a quarter machine at a gas station that i found in town that has a very low ppm but ph is always between 8 - 9. i try and feed my girls with a ph of 6 - 6.5 and the runoff is always around 7 but never higher than that.

my girls look healthy and strong right now, and i don't want to hurt them.

 

[dansbuds]

If your mixing a 5 gallon jug every couple days with RO water why all the need for recirc ??? what nutes are you using ? I use canna in 18 gallon rez's that stay full for 4 days minimum & never have to recirculate anything .
if you have clean nutes & they mix good .... setting a few days is not going to hurt anything . The PH swings ALOT when you recirc it !!!! mix up your 5 gallons real good, feed from it & next time you feed from it .... give it a good stir & check the PH ... i'll bet it hasn't changed much ... if at all

 

[drsmoke69]

i use aurora innovations sole synthetics.
5ml per gallon of the following
grow
bloom
trinity
big swell
and hygrozyme
this is my mix for week 1 of flower

dansbuds i like the advise, i will probably start hand mixing the rez's now and get rid of the pump. or go back to mixing each feeding daily like i used too. the reason i switched to a rez was because i was told that pre-mixing allows the nutrients time to, for lack of a better term "come alive". and this allows for better nutrient uptake. so far everything is looking great, it's just that the time i'm saving with a pre-mixed rez's is now being wasted on double and triple checking the ph all the time.

when using r/o water with a ph between 8 - 9, when is the best time to adjust the ph. before or after the nutrients are mixed? i have always done it after i mix the nutrients.

 

[dansbuds]

after all the nutes are mixed . i have no knowledge of the nutes your using , so i really can't give much more advice than i have .
are they clean when mixed like mine ? or are they kinda muddy ? if muddy i can see the need to recirc a setting rez , but like you sad ... the PH HAS to be adjust before each feeding & it might be better to just mix what ya need for 1 feeding & use it right away . my kid has to do that with the V&B dirty formula . its a PIA but it needs to be done that way . it won't stay good in a rez .

good luck Doc .... i'm sure you'll get it figured out & yes water temps will effect PH . but it will also effect the plant growth !!! make sure your water stays at room temp .... 72 degrees . to hot or to cold will effect the way they grow .

 

[drsmoke69]

cool man thanks,

yea these nutrients are real muddy dark and cloudy when mixed with water. going to go back to mixing daily i think. i like aurora and what there all about, and i have had great success with there nutrient line. i used to use GH's maxibloom but i like supporting the little guys in this industry if you know what i mean.

 

[dansbuds]