ph drops when added to medium - deficiencies

Im using an all mix medium. aqua mix

Im 4 weeks into flower and started with quite bad deficiencies.
Going down the process of elimnation, to determin the cause.

I always have my nutes going in PH'd spot on.

Today I did a little experiment. I checked the PH of a jug of tap my tap water = 7.0. Then I mixed into the jug, some of the medium mix, and the PH of that mix dropped down to 5.2.

Should I compensate for the drop with my next feed? for example add the nute with a PH of say 8?

Secondly - This is whats going on.

I would greatly appreciate your help - I know there bad and i shouldnt have let them get as bad. Ive been away

This is serious nute burn, right?

anyone? pretty please

hellloooooo??

Not nute burn, but some type of deficiency, which could be from low pH. I'm not too good at diagnosing deficiencies because I rarely see any in my grows beyond nitrogen and then I top dress my soil appropriately.

Try these:





Not knowing enough about your grow, it is hard to say what led to the low pH, but I do believe salt build-up from nutes can be a contributing factor.

cheers matey

dar242001 said:

View attachment 2661433View attachment 2661434

Secondly - This is whats going on.

I would greatly appreciate your help - I know there bad and i shouldnt have let them get as bad. Ive been away

This is serious nute burn, right?

Click to expand...

I'll go with brotherjericho and say it's a toxicity (salt build-up) flush them puppies w/sum straight tap water, and I do mean flush, if they're in a 5 gal pot, flush with 15 gal water...always flush with 3 times the pot size good luck and welcome to RIU

Did a serious flush about 6 days ago, when i so it had got out of hand.

Its probably taken until today for them to show a slight sign of recovery.

Ive got 2 kandy kush and 2 cheese in there. In soil/perlite mix (bought from hydro store), and feeding AN jungle juice 3 part. I added a little BIG BUD 2 weeks ago and Id say Its either since then or a coincidence.

The brown cripsy leaves was mainly effecting the Kush. Cheese are quite bullet proof and easier to grow i find. Anyway its seems to have stopped spreading further.

Either way, there now fully flushed and backed way off with nutes - finger crossed!

Thanks