OZhgardener
Member
has anyone had any experience good or bad with C.A.P.'s ppm-4. Im leaning towards it because im on a budget but at the same time, the fact that its the cheapest c02 controller on the market also makes me skeptical. I cant find a single review online about it and of course the guy at my local hydro store says it's a quality product and i should buy it :/. any firsthand feedback with the ppm-4, ppm-3 or any other controller would be greatly appreciated. thankyou all.