High TDS pour through method on 5-1-1 mix
I am having TDS readings of 1500-2500 ppm when testing the 511 mix via the pour through method. My other plants that I treat exactly like the 511 mix, in peat/compost/perlite are reading 300-1000. What would cause the TDS to skyrocket like that, the tannins in the bark?
I purchased a bag of "forest pine" uncomposted pine bark mulch that I pulverized to proper size. I measured five parts of that, one part of peat, one part perlite, and a tiny sprinkle of lime.
What TDS does your 511 mix read?