Nutrients Which nutrient lines are the most pH stable?

[Mañ'O'Green]

Ok so you are talking about a PH change in a stagnant bottle of mixed nutrients? or do you aerate it? Mixed nutrient should be aerated or stirred with a pump constantly.

I believe it could be a reaction with the Cal-mag you are using just sitting idle it will bond to other elements causing what you are seeing. It also locks-out the nutrients it is bonding to.

 

[CannaRuss]

Oh, gotcha. I mix a gallon of nutrient water, then use it across 2 -3 days watering once a day. I noticed the swings in that gallon. I never really check the ph of my runoff, but the EC is around 200 - 350 lower than incoming water (which is what I've heard is ideal).

If you mix and buffer to 5.8 a slow pH rise is actually a good thing so long as the range stay's between 5.8 to say 6.2. That swing will make your Nutrients more widely available to the plant.

 

[Bantersaurus]

I bought some silica and GH's micro and bloom. I mixed 'em using Lucas' formula of 6 mL micro and 9 mL of bloom, and it came out to ~1300 EC (which is about right for mid to late bloom). It's about 300 less than what I was getting with my Mega Crop mix, but I figure I can just keep upping the bloom for more P/K until I find where my plant's max EC is for this line. We'll also see how much it drifts - it took more pH up to get it up to 5.8, so I think it's going to be more resistant to drift. Either way, I'm tired of dealing with little white balls.

Ok so you are talking about a PH change in a stagnant bottle of mixed nutrients? or do you aerate it? Mixed nutrient should be aerated or stirred with a pump constantly.

I believe it could be a reaction with the Cal-mag you are using just sitting idle it will bond to other elements causing what you are seeing. It also locks-out the nutrients it is bonding to.

Yes, it's a pH swing in a gallon of prepared nutrient-water. I don't aerate it, but I'm not sure I need to go that far.

If you mix and buffer to 5.8 a slow pH rise is actually a good thing so long as the range stay's between 5.8 to say 6.2. That swing will make your Nutrients more widely available to the plant.

It drifts up to 6.4, so I hit it with some pH down to get it to 5.9 - 6.2. I'm worried that having pH up and down is going to be bad for the plant long term.