Do you re ph the water in your reservoir?

[The123321]

I am looking at using autopots with water with calmag with silicon in it. I have been mixing a few days worth at a time and then when I test ph in the water the next day it is like .5 higher. How does that work with a reservoir? Do you test ph in the reservoir every day and then adjust it as needed? Is there a way to keep it from drifting up like that on there? I use gh ph down with tap water on there. If you have to test and adjust the ph every day that takes a lot of the convenience of the autopots out from it on there.

 

[PurplePotion]

Yes and this will be the case with almost every recirculating system. The larger the reservoir the slower the pH will drift (some drift is good). Drain to waste to avoid it and a plethora of other issues.

 

[Frosty Nuggets]

As the plant uses nutes the ph goes up.

 

[PetFlora]

Yes and this will be the case with almost every recirculating system. The larger the reservoir the slower the pH will drift (some drift is good). Drain to waste to avoid it and a plethora of other issues.

I have used D2W when I was doing HPA. IMHO, it is not necessary during veg and early flower, but once buds set, plant chemistry changes to feed the bud sites. These sites dump waste through the main stem and into whatever medium is supporting them. In hydro, that is the rez, where the pH can change radically DAILY depending on how big the plants and root mass is.



hth

 

[PetFlora]

I am looking at using autopots with water with calmag with silicon in it. I have been mixing a few days worth at a time and then when I test ph in the water the next day it is like .5 higher. How does that work with a reservoir? Do you test ph in the reservoir every day and then adjust it as needed? Is there a way to keep it from drifting up like that on there? I use gh ph down with tap water on there. If you have to test and adjust the ph every day that takes a lot of the convenience of the autopots out from it on there.

I check mine daily, and adjust as needed. As was mentioned, some drift is fine

 

[Douglas.Curtis]

I am looking at using autopots with water with calmag with silicon in it. I have been mixing a few days worth at a time and then when I test ph in the water the next day it is like .5 higher. How does that work with a reservoir? Do you test ph in the reservoir every day and then adjust it as needed? Is there a way to keep it from drifting up like that on there? I use gh ph down with tap water on there. If you have to test and adjust the ph every day that takes a lot of the convenience of the autopots out from it on there.

Since you're not using a re-circulating system, your issue is not going to be plant related. It sounds like elements in your tap water are interacting with your nutes, calmag and silicon. Are you getting any precipitates at the bottom at all?

Your pH should stay the same, so gradual changes work well. The plants experience a pH drop as they dry out each time, and this will affect where your starting pH in the res should be.

 

[The123321]

Thanks. I plan to now test the ph in the reservoir every day on there.

 

[Douglas.Curtis]

Good plan, since sudden changes in pH are a sign something is wrong it's best to catch them early.