Then use the ppm meter because I can almost assure you it is actually an EC meter. Do the calculation back according to NaCl or KCl, 07 and 05 respectively.
Technically they are entirely different. Total dissolved solids is a measurement of actual dissolved solids in solution. EC is only a representation of the resistance in solution. The two are theoretically not interchangeable and entirely different. Your confusion comes in from companies converting the resistance into a possible representation of total dissolved salts or "part per million". This conversion is based on particular parameters and works more as a representation than an actual account for the solute. Try aim to use EC rather than TDS/PPM. If you know what you put into your solution, you can use a bit of simple math and work out your concentration by resistance.
Peat lost popularity here because of cost. Coco was cheaper and punted as being as good/better. I prefer peat, the pH is easily balanced and the activity is far better imo. It the medium preferred by professional flower growers, however the cost is often the reason it is ignored. Want some golden advice? If you use Lime/Rock dust/Phosphate/Oyster etc, you'll want peat not coco.
Yeah cos you shared the cost on the umpteenth shipment that duds out in customs? Neigh bra, if I'm spending a few hundred dorra on cuts, I'm not sharing for shit. Everyone is an adult and capable of doing it for themselves, the info is out there, the opportunity rife.
No licenses have been issued. The only trials that have occurred are with Tilray products and only available to those who were a part of the trial. Don't hold your breath until Rama has to run again.