can you help me?

[ninjatoker]

what is the difference in ph and ppm? What are they calibrations of? And where shoud they b at?

[oldmac]

Ph is the measuement scale given to water and indicates how acidic or base the water is. What Ph you need depends on what type of medium you grow in. For hydro or rockwool mediums usually it's abt 5.5 or so, for coco users usually a little higher. For soiless growers (Pro-Mix or Sunshine) abt 6.0 and for soil abt 6.3. Keep in mind this may vary some depending on strains, nutes used, etc, as they say your mileage may vary.

PPM stands for parts per million. Using a meter designed for this, you can measure the amount of nutrients you have in your water or find how much crap is in the water you are starting with.

Hope this helps you.
OM

[ninjatoker]

yes it did help, another question, is it needed to keep track of the ppm?

[BudLuv420]

Yes it tells you if your babies are feeding or not. Plus it a good way to prevent nuite burn/lockout.

[ninjatoker]

ok, well looks like I need to go get a ppm meter and soon...

[drudown11]

The Ph(acidity or alkalinity) of your nutrient solution determines how the plant absorbs it.

Look at the chart. At about 6 all of the major nutrients are being absorbed in decent amounts, but at a ph of 4 many of the nutrients cant be absorbed.

You can fertalize the crap out of a plant and it wont do any good unless the PH is dialed in. The nutrients are still present, just not available by the plant because the PH is off.

[ninjatoker]

ok, got it... Thanks that's very clear...