Yeah but what I was getting to run around the bush about was the TDS function, the rest was just intended as fun, I apologize if you took any offense. There Certainly was NO offence intended.
I didn't understand the source of TDS as I thought you filtered the flow from collection to it's ultimate destination, certainly you would filter the growth medium after you mixed it and before you
pumped/poured it into your reservoir or holding tank so TDS?...
Doc