I live in northern Colorado, the guy at the grow shop did mention that we definitely need cal mag in the water. I've bought some just have yet to use it. I dont currently have a PPM tester which I assume is what would tell me how "hard" my water is? Just a PH meter currently.Cheech,
Posted before seeing those latest pix. Looking OK...meaning spots aren't too bad. Jow hard is your water? You may need some calmag...just don't know.
JF
Cheech,
Some communities have good water quality reports online. Check into that. If you're under 200 to 250, you should be ok. I've grown in 400ppm water and had problems. RO by necessity.
The letting the water sit thing is for the chlorine to evaporate. Chlorine isn't a problem...your nutes will contain it. But choramine does not evaporate. It also won't really hurt anything. Point is I wouldn't bother with letting it sit. Doesn't do much but warm the water. Overnight is fine if you insist. lol
You are probably ok just using it out of the tap.
Hey you asked when to start nutes. I say just do what other ffof growers do. From the time you go into final pot...wait 3 or 4 weeks before feeding unless you see yellowing.
JD
Which number should i be focusing on for the PPM? I found a report for the closest town ( fort collins, CO) and the highest PPM im seeing is 25. With a few others around 1-5 but nothing even close to 100 or more. When you say RO by necessity is that just if youre working with super high PPM? Or is RO something ALL growers should be looking into?