daveroller
Well-Known Member
1.5 ms/cm to a Hanna meter that's 750 ppm I just looked up.
My tap water is at .5 ec already and I followed the nova bottle for early veg growth it said ec of 1.0 I'm pretty sure I've kinda took some advice off the guy at the hydro store and he said to kind of not so much worry about the .5 ec in my tap water but I'm still really new to this so any advice I'll gladly listen to I'll check her out tomorrow and see how she's going fingers crossed she's not a crispy mess lol
My Hanna combo meter can be set to different conversion factors, from .5 to .75 I think. Mine is set to .66, but I think you're right that it should be .5 for American meters. (link to reference)
But even if you use .5 to get 750 ppm, that still seems too much for a seedling. Try to get it in the 300 ppm range (.6 miliSeimens). I start raising it after the plant's grown some big fan leaves, after the first couple weeks of veg. Most recommendations I've seen here tend to max out around 800-900 ppm, but that's only when the plant's close to its maximum veg size. Anyone, please correct me if I'm wrong!
Personally, I never use tap water because the stuff from my tap stinks and I almost never even drink it. And if you start out with RO-filtered pure water, you have more control over the minerals that go into it. But other people swear by their tap water, so it might be ok. For you, it's an experiment with 2 possible outcomes. I hope it's the good one! But I'd recommend starting with pure water and adding exactly the amount of nutes you need.
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