I dont understand why 0 ppm water is used as standalone for any reason in hydroponics expect a final flush.
I JUST went through this last night with my buddy. He cant get clones to root. LONG LONG story short, he uses RO waterto soak his rapid rooters.
0ppm water is useless, pH is off, contains no buffer, contains no beneficial nor useable nutrients, and is not good for a plant as it will leech out needed minerals and chemicals from your cuttings as the medium attempts to stabilize.
To root cutting properly (using a 3 part)
Start with 1 gal DI h20, add 5ml gro, 3ml micro, 2 ml calmag (MagiCal etc..), 4ml .30mol phosphoric acid (standard pH down), AND a teaspoon of Root Tech hormone. PPM should reach 5-700, and pH should stabilize around 5.9.
Now do you cut a hardened stem, just below a node, and shave off that node from the meristem before swirling in root hormone?
I obtain 99-100% success rates. Havnt lost a clone in...? But i did just throw 15 away! lol
Follow this and you WILL see results.