I have been making charcoal for the last few weeks using a double barrel system. 30gal in a 55gal. It produces better each time. I'm still learning. My last batch was 15-20 gallons crushed. A biproduct of the combustion is ash. Can I just use the hardwood ash for activating it? It's potassium based so plants will love it still Mix ash with water add a little pickling lime to get the proper ph and then put it back in the reactor a few batches later when I can refill the barrel? It would seem its way more valuable for nutrient absorption. Even though I'm really just doing it for soil water retention I want this stuff as potent as possible. What would the proper ph be to make the char active?