[cdrchoad]

Thanks for the thread it has been helpful-

i have been experimenting with two different pieces of equipment in my grow.
1 The Oxy-doser this is a venturi aerating device of Japanese manufacture and I am running it with a O2 input from an O2 generator for medical purposes.
2 The UFB or ultra fine bubble generator also of Japanese manufacture using a normal air input.
I have clocked the Oxy doser with my dissolved oxygen meter when it was working (Sper Scientific P,O,S.) and it blew through 100% D,O, in about 10 minutes on a small volume of water. I have been using both devices in my grow and have been having some strange problems. My question is what are the chemical effects of high values of dissolved oxygen on the fertilizer and substrate? i have'nt seen any noticeable changes in PH and I run these overnight often.

[The.Cook]

If nothing, more of a biological thing than a chemical one i'd suppose

[KBD]

So I just finished my 1st coco grow and had some issues with mag. The coco I used was the gh compressed stuff that I flushed with tap water .18 ec tell the runoff was down to .2 ec. Then I flushed with .4 ec nutes.
I feed h&g coco line 4 to 5 mls per gal and everything was good for a couple weeks then mag issues stated. So I added calmag and within a week my mag was fine but leaves turned almost black to I switched to just epson salt and was fine for while but then I had to up the Epson dose every week or 2 to keep the mag issue at bay.
Does this sound like a problem with my ions and such or could it just be a mag hungry og strain?
I am getting ready start a new grow and was wondering if I should buy the more pricy coco being that comes with the proper ballance out of the bag or if I did fine charging the compressed stuff and it was just the strain that had the mag issues?

[The.Cook]

I usually flush it with ro water first and then with a mix made of RO Water + Tapp water till 0,4mS (consider that ec in my tap is almost completely Ca and Mg) than nutes till 0,9mS.
This is also the mix I'll start with.

0,4 seems quite low... also consider that Ca and Mg are really easely bonded by Colloids

[WaxyTaxi]

I'm starting to feed mine compost tea. Pure coco in 3gl smart pots. Jacks/Calnit/Fulpower.

I am wondering how much of the bennies can stay alive if I am feeding with salts so often?

After my last run, I am determined to get a stronger smell, now that I've got better genes I think the compost tea's will help.. Any advice Cook?

[The.Cook]

Sorry man I feel I'm about to ask a silly question... What does "bennies" stand for??

[Phagoos]

Bennies = benificial bacteria

[The.Cook]

Quite difficult to answer, really, but I'd say if you'll be able to avoid salts built up you should be halfway through

[northernm]

Hey Cook,

great thread, lots of valuable Information!

I have a problem with the runoff pH of my coco as it is too low, around 4,9.
I already flushed it with pH 6,0 (EC 0,4), but instead of rising in direction of 6,0 it dropped even more to 4,6-4,7 (EC 0,4-0,5 as it should be)...

Any help is highly appreciated!

[The.Cook]

Have you tried do slurry-test it?