Wow you got it going on!
It has been a lot of work so far, and there is still lots more to do.
Wow you got it going on!
Have a read here and any questions feel free to tag me.@Moe.Red
Is there a particular sub-forum where I can get some help with hydroponics? My plants seem to be doing really well but I'm having some difficulty with pH.
Switch to phosphoric acid. You can probably find it super cheap at any hydro shop.@Aqua Man
Read and understood, thank you.
Understanding is one thing, but my experience level on this is very low. I'm on my fourth round of nutrient solution in a 40 to 50 gallon RDWC. It seems that each successive round of nutes is harder and harder to keep below 6.5... I'm using what I consider to be excessive amounts of pH down (10-20g of GH pH Down dry concentrate), daily.
Tap water is pH 7.6 / PPM 55-95
I store 50 gallons in a drum with 2 air stones for a week to off-gas chlorine, until the next nutrient change. After bubbling for a week, it's pH is 7.8 - 8.2.
With nutes mixed in, solution is pH 6.9.
Adding 25g pH down brings it to 5.5 or so but 24hrs later it's at pH 6.3 or higher...
Last night pH was at 6.6. added 15 g down and this morning pH was at 6.6. I added nothing this morning to see how far up the pH would go and 8 hours later it was at 6.8 this evening.
Since mixing this round of nutrients on Saturday morning, I have added 95g of pH down.
The only other thing I've changed in this round of nutrients is that I added hydrogen peroxide for the first time. I used about half of the recommended dosage cuz that's all I had on hand.
If thats the case then a larger buffer will be needed.My reading says both the liquid and dry GH pH down are phosphoric acid [ food grade].
I am not doing bad at coco/perlite learning about good "bagged" cana or Royle Gold. I am mixing FF Coco Loco 30% to canna and the macro photo's I recently took and posted show my improvement but, your hydroponic knowledge is always on point, I salute you @AquamanIf thats the case then a larger buffer will be needed.
also if using tap water do not forget the ph will rise roughly 0.4 in the first few hrs out of the tap with aeration
I really need to make my way back into some grow threads but life is hectic and hardly time to post lately… i dod see some pics the other day and looks like you killing it brotherI am not doing bad at coco/perlite learning about good "bagged" cana or Royle Gold. I am mixing FF Coco Loco 30% to canna and the macro photo's I recently took and posted show my improvement but, your hydroponic knowledge is always on point, I salute you @Aquaman
Yeah thats citric acid, sulphate and urea… that a more organic in a sense approache. Good for soil grows to adjust PH for mixing. But just not stable enough for hydro.6.8 last night, added 20g of this, 6.7 this morning.
Not sure if it matters but this product is 15 years old. Stored in dark cool environment.
View attachment 1341078
Test strips are brand new, bought them to verify readings of pH pen.
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Will go to hydro store this evening if I can. Busy day...
Thank you all for your help so far, this is getting frustrating but the girls look great!
I have, and it is always a possibility, but I'd rather just use tap water if I can get away with it. I acquired phosphoric acid yesterday and I am changing the nutes this morning . I'll make sure I flush the system real well to get all the old solution out so I can start fresh.Have you considered RO water?
My guess is the KH in your tap is high and causing the pH bounce.