Aaron Quix
Well-Known Member
Re: DocBud - New Room - Super Soil - Etc.
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Doc been reading your journals and wanted to say thank you for all you have given to everyone here.
I have a question if you don't mind. I have tried Hempy buckets with perlite and oc+, I find that the res gets acidic during flowering. I also use RO water.
I was wondering what your take would be on treating it more like a soil grow as far as PH levels? Say keeping it around 6.5 instead of the 5.8 to 6.2 range.
How do you know the res is acidic? In other words, how did you test it?
OC+ is not a buffer, but it is pH neutral.....I tested it myself before trying it in perlite. What else are you using in your water besides straight RO?
You might try mixing a bit of tap water in with the RO, as the salts and ions in the tap will stabilize the pH.
How are the plants growing?
I have checked the runoff after watering with PH 6 RO water 5 and 10ml/gal cal/mag. PH of runoff was 5.4 to 5.6.
As far as adding tap I think that is not a good idea in my case my TA is really high.
The clones I did looked great in veg. Then once flowering got into about the fourth week they started getting what looked like a cal/mag def. I tried to up the cal/mag to 10ml/ per gal. It didn't help growth was stunted bad. I have a link to my new grow in my sig, trying seeds this time and still using perlite and oc+.
Thanks for the help Doc.
Well, let's think this through......
Perlite.....pH neutral
RO.....can't even measure pH.....no ions, no buffer
OC+.....pH neutral
Cal/mag......here's your problem! (unless you're using other stuff too?)
I'll bet your Calmag is quite acidic....what's in it?
If it were me, I'd add tap water till you get a TA of about 60. Then pH down to 6.
Easy!
I use botanicare cal/mag. I have tried with Snow Storm Ultra as well same results. So I get this correct RO + tap TA around 60 PH 6 no cal/mag.
I have tried this as well my first try I did not have cal/mag staarted to show signs of def so I started to add the cal/mag. I don't know I'm at a loss.
Just try it and add 5ml of calmag. What I'm trying to do is get your feed water buffered a bit to keep the pH steady.
Botanicare CalMag is on the acid side a bit.....Calcium Nitrate. Great stuff, but often fed with other hydro nutes that would stabilize pH a great deal.
I see where you are coming from. My only problem is I'm limited to just usin RO water. My city water supply comes from six different wells.