Grow Mediums pH fluctuations

[Sublime Rasta]

I have just finished my fourth successful grow, and I now have a grip on the majority of essentials for hydroponic growing. However; I still have not figured out how to maintain a more stable pH. It seems like I have to add pH down every day. I utilize single bucket deep water culture. I use general hydroponics pH down dry and wet. Any solutions or tips are highly appreciated.

 

[gbd]

Have you had any discoloration of the roots? I ask because I had this problem during my third DWC grow and it was due to root rot ultimately. If no root issues than your plants may be asking for more nutrients. The rule of thumb is as the EC/PPM of your nutrient solution decreases your PH increases, so upping the feed a little bit will help to remedy the issue. Same in reverse, when your EC/PPM increases your PH decreases. Eventually you'll find the 'sweet spot' where the PH and EC/PPM all remain stable with little fluctuation. Do you let your water dechlorinate for 24 hours before use? What nutrients are you using? Hope this helps. Best of luck.

 

[gbd]

After looking at some of your other posts it seems that I'm probably not telling you anything you don't already know. Hope you get it squared away!

 

[Pal23]

Might be an idea to think about running a bigger reservoir? They require less effort to keep them stable in relation to PH because it is a larger volume of water. Also means less res changes if that appeals to you! Other than that and what gbd has mentioned there isn't really any way around adjusting the PH, it's part of the process in DWC and requires monitoring at least once or twice a day for stable results.
How big are your PH fluctuations? For example if you set it at 5.8PH where does it usually end up after 24 hours? If you are getting big fluctuations there could be an issue we need to work out but if its just .1 or .2 that sounds fairly normal.

:Sharing One:

 

[Doulovebeef]

+1 on bigger Rez, my first time was 5 gallon bucket dwc and I was messin with the girls sometimes twice a day just to keep ph in range, this time I'm running a 60 gallon rdwc and I maybe have to adjust every 5 days, same nutes.

 

[Bamba]

As a fellow DWC that crying over ph fluctuations....

IT IS a damn nightmare... My ph going from 5.8 to 4.5 or 7.0 in period of hours...
First day today after 1 month in flowering that my ph went from 5.8 to 6.4 in a period of 8 hours... But to keep it stable for 1 whole day?!?!? that sounds like a dream to me...
I cant leave the girl alone for even 24 hours... yesterday I found the water allmost run out, ph at 4.5 in under 24 hours of me not baby sitting her. Hot weather and she drank allmost 8L
But thats how i have to roll it seems if I go any bigger(60gal.. damn I am envy you now) I ll need to setup a scrog to keep the babies under size controll.
Only tip I can offer from my little to no experience is play with the EC, lets say you have 10L mix to make, you go and make 15L. So you have 1 day of feeding ready if by a miracle you hit the hot spot at once or else you have exactly the same mix that you split for 2 topings.
It will save you time, It will save your precious medicines(from errors and I wasted alot of them tbh ) and way easier to lower/raise the ec untill you hit the stable spot you need.
But when a descent plant drinks over 5L per day, You cant avoid daily care.
:Sharing One:

 

[Abbmacher]

Did you use Rockwool, if so did you soak it in ph'ed water first?

 

[Bamba]

Yes in my big girl in the new one I did only some rinses with hot water but the ph is almost solid I forget to even check it.
also for example until yesterday the ph was going up today ph is going down ... A freaking madman house.