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So if my ppm is supposed to be 500ppm, then that is total ppm including my water ppm? So if my water is 250ppm then I add nutes to my water until I have a total 500ppm?

Here is my PPM meter.... https://www.amazon.com/gp/aw/d/B06XKMH86J#Ask My PPM meter is open meaning no scale. I'm not sure what that means for my reading. If it's not 500 or 700 scale, what is the difference in the reading? Mega crop says for Veg 2, 500 scale, feeding should be 555 PPM. Mega...

Could someone please give me some advice on a feeding schedule for Mega Crop and Happy Frog soil? I am going to plant directly into Happy Frog after germinating. The MG I have is 9-6-17. I use tap water dechlorinated and it has a PPM of 250. I was going to feed at 1g per gallon the first...

Right now I have a Spider Farmer 1000 for my 2x2 tent. I want to be able to grow 2 to 3 plants in the tent. If I upgrade to a Mars hydro 2000, will that be sufficient enough for my space?