My water is garbage and I have to install an ro filter, but the bloody things use mad amounts of water so I'm looking at Autopot as my best use of it. Ffs I know nothing of ppm/ec (as evidenced by my severely pissed off Jack Herer) - but am gonna have a go at coir in autopot. At some point I will grow a healthy auto, am doing Sweet Seeds Gorilla Girl in Allmix at a mates and he's absolutely smashing it with Oldtimer he feeds and waters when he feels like it knows nothing of growing and he's doing great! While I grow limp moody skinny buds on decent sized plants. I'm in a crises and my wife's pissing herself - feel the love. Your doing good bro - everyone's autopot diaries have become my required reading, gives me hope!