500 or 700 scale?

[rarebreed619]

Hello all had a quick question, when using AN ph perfect base do I use 500 scale or 700 scale ec? Or does it matter?

 

[Nizza]

i like using 700 scale personally but not for any reason

 

[superstoner1]

It has nothing to do with what nutes you use, it is a conversion factor for different ways of measuring tds when using a meter.

 

[machead]

AN use the .500 scale if thats what you mean

as sure they say get your ppm to 1080ppm dont unless u wanna burn the hell out your plants start of at 1/4 strength an build from there

 

[rarebreed619]

AN use the .500 scale if thats what you mean

as sure they say get your ppm to 1080ppm dont unless u wanna burn the hell out your plants start of at 1/4 strength an build from there

hit the nail right on the head, yeah I don't really follow the rec dose kind of see what the plants want and go from there. Thanks everyone for the advice.

 

[ilikecheetoes]

dont use that idiotic scale and just use microsiemens (EC) like the rest of the non pot growing world.

 

[oxanaca]

dont use that idiotic scale and just use microsiemens (EC) like the rest of the non pot growing world.

TDS is pretty goofy, im not sure why anyone uses it. i actually dont even measure conductivity anymore, i use actuall PPM based on how many grams of calcium nitrate, mag nitrate, MPK, ect. i add per gallon of water. only way ive found so far that makes any sense.

my formula in ppm is

120 N
60 P
300K
120 Ca
60Mg
70S
7.5Fe
not sure on the rest of the chemicals but i use peters S.T.E.M. micronutrient blend. at 7.5ppm iron