DynaGro in RDWC, PH starts very low, takes a lot of ^ to adjust.

**m420p** · 10-18-2012, 01:29 PM

I'm running a recirculating deep water culture and I recently switched from AN Sensi Bloom for my bloom nutes to DynaGro Bloom. I use distilled water with cal/mag since my tap water is too heavy in Iron. When I was using AN Sensi Bloom and a few additives(BigBud, Voodoo Juice, B-52, Overdrive, and Final Phase), I would add the needed nutes to the water and only have to adjust PH DOWN about .2-.6 to 5.8-6.0 with a few drops of PH down, around 1 ml. Now in bloom I'm using DynaGro with the AN additives when their schedule calls for each, I just substitute DG bloom for AN sensi a & b bloom in AN schedule. Now with DG bloom, after adding the nutes to the water(B-52, BigBud, CalMag, and Bloom right now), the PH reads low to mid 4's. I have to add 20-40 ml of PH up, ya 20-40 ml.

I thought it might be because of salt buildup in the roots and system so I cleaned, flushed, and replaced the nutrient solution and it still took 20-40 ml of ph up to adjust ph. The only other thing I can think of is having to much air running in the system since I have 8 airstones running from 2 4 nozzle air pumps for three huge plants and a res(2 airstones in each). I once read that too much oxygen in the water will keep your ph down.

Is this Normal with DynaGro or does anyone have any ideas of what might be my problem here?

**Cannikid** · 10-18-2012, 02:19 PM

DynaGro is acidic because it has to suspend 16 different elements. It is normal to have to raise the ph a significant amount. Is the ph up amount you listed per gallon? If that is the case there is an issue. If the amount you listed is for your whole reservoir we need to know the size to know how much you are adding per gallon in comparison to how much of the dynagro you are adding. I personally use ProTekt to raise my Ph and I usually use about half the amount compared to the bloom fert. Its a ration of 2bloom to 1 protekt

**m420p** · 10-21-2012, 02:38 PM

Originally Posted by Cannikid

DynaGro is acidic because it has to suspend 16 different elements. It is normal to have to raise the ph a significant amount. Is the ph up amount you listed per gallon? If that is the case there is an issue. If the amount you listed is for your whole reservoir we need to know the size to know how much you are adding per gallon in comparison to how much of the dynagro you are adding. I personally use ProTekt to raise my Ph and I usually use about half the amount compared to the bloom fert. Its a ration of 2bloom to 1 protekt

I meant a whole system, res. and buckets which altogether is about 9 gallons. I have been trying to put off buying DynaGro's Pro-Tekt, KLN, and Grow Nutes because I have leftovers from AN but if ProTekt will spare me adding that much ph up I'll get it. Thanks for the feedback, sorry for the late reply, had a friends wedding this weekend.

**BigBuddahCheese** · 10-22-2012, 07:40 AM

I use dynagro with protekt and mag pro both worked well and ph was rock solid. Are your roots healthy? Unhappy roots can cause ph fluctuations or over/under feeding.

**Malevolence** · 10-22-2012, 11:17 AM

I've had similar issues using dg bloom with and without protekt. It seems like I can dump a whole fuckin bottle of ph up in my bucket and it refuses to go above 5.5ish... which is too low for P from the little ph chart u see floating around here. that said I'm using ph test drops and my buds are fat so I didn't think much of it.

**m420p** · 10-22-2012, 08:31 PM

Originally Posted by BigBuddahCheese

I use dynagro with protekt and mag pro both worked well and ph was rock solid. Are your roots healthy? Unhappy roots can cause ph fluctuations or over/under feeding.

My roots are as healthy as can be, water temp always at 68-72 degrees F. Its definitely not under/over feeding, I'm no newbie. From what everyone else is saying it's the lack of protekt. I'll have to pick some up.

**BigBuddahCheese** · 10-23-2012, 05:04 AM

Originally Posted by m420p

My roots are as healthy as can be, water temp always at 68-72 degrees F. Its definitely not under/over feeding, I'm no newbie. From what everyone else is saying it's the lack of protekt. I'll have to pick some up.

Well then I guess you have it all figured out guess you didn't need to ask for help you "non-newbie" you... Lol.

DynaGro in RDWC, PH starts very low, takes a lot of ^ to adjust.

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