Sorry of this has been covered but i can't find much info. I need a decent quality soil PH probe.. do they exist (accurate/quality) & if so where can i get one (UK) ?
cheers
Sorry of this has been covered but i can't find much info. I need a decent quality soil PH probe.. do they exist (accurate/quality) & if so where can i get one (UK) ?
cheers
To test soil PH you really need to do a slurry test if you want accuracy...
It's Not What You Know, It's What You Can Prove
B.A.BARACUS (06-04-17), Dupe (07-04-17), GEORGE (07-04-17)
Ok thanks. So then, any suggestions how I work out what is wrong?
Day 40, 3 x Mephisto Toofless Alien auto's under 200 wall watts of COB, all have what look like a whole load of deficiencies which started 1.5 weeks ago, brown spots, yellow leaves, slow growth etc. 2 more different strain plants next to them are thriving but all receiving the same feed. All in airpots, plagron light mix, AN sensi bloom + Plant Magic Magne cal @ 1ml/L. EC of feed is around 1.6, PH going in is around 7. RH around 60%, temp around 25C. Never had this before.. complete mystery. Flushed them 5 days ago as last resort but still gradually getting worse. Only thing I can think of now is testing the soil as this would give me, I would have thought, an indication of either a lack of or too much feed. Can't take any pics atm. Thanks for any help.
GEORGE (07-04-17)
Hard to say, but why are you adding cal/mag.. Did you have a deficiency or did you just add it anyway?.. It can play havoc with roots & cause all sorts of issues and that is why we foliar feed it.
I would start a thread in the infirmary section & you should get better advice in there + you don't need to check ec or ph, that just complicates things as they're for hydro, Sounds like a lockout but without pictures it's going to be hard to diagnose.
Dupe (08-04-17), GEORGE (07-04-17), Greengrass (08-04-17), M_C (08-04-17)
Thanks for the advice, yeah should probably start a thread in the infirmary, always a bit paranoid adding pictures though! Added the cal/mag as I thought possibly had a cal deficiency with the brown spots.
THCtalk.com Disclaimer - You must be over 18 years old to view/use this site .THCtalk.com does not encourage growing Cannabis or possessing Cannabis. Learning how to grow Cannabis instructions should be for educational purposes only. All Information contained in this web site is for: Historical reference, Scientific reference and Educational purposes only. Visitors to this website are advised against breaking the law as It is illegal to smoke, grow, or possess cannabis in the UK and some US States
Bookmarks