In Hydro, PPM goes higher as water gets lower...why?

[nickelrw87]

Like the title says, in Hydro, why does the PPM go higher as the water gets lower? I understand that if you have a certain PPM of something in liquid, and the volume of liquid becomes less than when you first started, the PPM should be higher concentration. That is if nothing is using whatever the PPM is (ferts for our example)

For example:

Lets say i have 800 ppm at full res. In two days as the plants suck up the H2O, the water volume is less, but the PPM may be significantly more than when we first started, around 875-900. Shouldnt the plant consume the ferts at the same rate of the H2O? Is this a good way to gauge that there may be an issue with the grow op? Maybe to low or high PH so the plant cannot take up the fert, lowering the PPM?What do you guys think?

Im just trying to learn - dont be a diiick please lol

 

[PeytonManning]

That just means that your plant is drinking more of the water and not absorbing all the nutes.

 

[BuddroGreen]

Plants don't use nutes & water in equal proportions....so higher ppm means plants are drinking water....lower ppm means plants are using nutes. Try to find that sweet spot in every growth stage of ppm-water usage, so as the water level goes down the ppm you started with stays close to constant.

 

[c526]

Im just trying to learn - dont be a diiick please lol

doesn't happen here.

Peyton and Budrow above are correct,sometimes they eat sometimes they just drink.

 

[nickelrw87]

ok so there is nothing to worry about really - just the way things are. Good to know.