PPM increase overnight

What would cause my PPM to go from 1300 to 1750 over a 24 hour period
Over feeding?
It is in 2nd week of 12/12

sounds odd but seen it happen, did u properly mix your solution. Then if you did that, then are you in veg or flowering, becuase that is really high i burnt my plant at the level of PPM (only started showing like 5 days later) then here is what i personally think, you plants are not using all those nuts so only taking the water, so less water and no absorption of nuts. So more concentration on nuts, so lower your nuts to about 900 and should be even amount of nut and water consumption. Hope that helps

mikmike said:

sounds odd but seen it happen, did u properly mix your solution. Then if you did that, then are you in veg or flowering, becuase that is really high i burnt my plant at the level of PPM (only started showing like 5 days later) then here is what i personally think, you plants are not using all those nuts so only taking the water, so less water and no absorption of nuts. So more concentration on nuts, so lower your nuts to about 900 and should be even amount of nut and water consumption. Hope that helps

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exactly right

Your plant is possibly drinking more water than nutrients?? Could be on the verge of lockout? Any signs of nutrient burn? I am just tossing out ideas here

They would have to have drank a quarter of the water in 24 hours. Maybe your meter is screwing up? They must be sativas to even handle that ppm in the first place but they can't handle it much longer, you've got to dump half of the solution and add straight water.

its being overfed
add water to bring it down to desired ppm
and calibrate ur meter

Quick question, do you clean the resorvoir every time you do a water switch? If you dont i that might be a small reason for the ppm increase, i always cleans mines out everytime even though its a pain in the ass. i agree with moash as well. the plants is not taking up any nutes whatsoever. It could be that she is locked out, but most of the times is just that at that level she might not like it. Just bring it down to 900 ppm and go from there. Oh yeah and like moash said calibrate your meter if you havent done so already.

These are ALL sufficient to why the PPM would rise!