New Primeagra question/problem

[Ray]

Could be.

Steve, if you resoak those pellets, any chance of measuring the pH of the solution?

[Tindomul]

What do you use to lower the pH?
I've noticed that the roots on my orchids in S/H are turning brown/brick red, same color as the leca. I flush every week, and I mist them everyday. Does daily misting cause the minerals to wick up the roots faster?

[20jlr]

Why was the shape of Primagra changed? The stuff I use has a very differant shape. Amore uniform color and less regular shape.

[Phalguy]

Originally Posted by sailor

I recently started adjusting the pH of my watering/feeding solution to 5.9 and the deposits disappeared within a couple of days and haven't reappeared.

Hello!

I`m doing the same thing since july 2004, adjusting the PH to 5.6 with nitric acid 15% ( 1 ML per gallon ).
I don`t have this problem anymore !

[Tindomul]

Nitric Acid!!!!!!!!

[sailor]

I use "pH Down" from a local Grow Shop. Contains Phosphoric Acid, Citric Acid and Ammonium Bisulfate. About 1/2 ml in a gallon lowers my pH from 7.1 to 5.9.

[Ray]

20jlr - read this:

Improved PrimeAgra

[Tindomul]

I work in a lab with access to all sorts of acids. Would I be able to use any of these safely with plants? HCl, Acetic, propionic acid, surely not Sulfuric.

[Orchis]

Hi,

I let pellets stay over night in water with
addition of vinegar acid (25%) and then rinse
well!! with tap water and let them soak another 5 days
in tap water, I do it twice until there is no smell of vinegar.
I think maybe citric acid would be better.
I got some pellets that was used in normal hydroponics
and build extreme salt (minerals?), so I had to get rid off...
Now, even after month, they look better than new

[Tindomul]

Ahh, good ol' lemon juice. Ofcourse! Thanks. And here I am trying to kill a fly with a shotgun.