What does PPM stand for? on the back of the advanced nutrients

i bought some advanced nutrients for my plants, and i don't know how much to add to my water.

Sensi Grow (Part A & B)

This website has the table that says how much to mix, but i don't know what ppm stands for.

please help

Parts Per Million

oh word... so what does that mean?

Parts per million (PPM), and Electrical Conductivity (EC), both the same thing, two different units of measurement.

Americans tend to use PPM more often, and europeans use EC more often.

You need a TDS electronic pen reader (Total dissolved salts) which tell you the PPM (parts per million) of the TDS of the water.

This is how you know how strong your nutrient strength is.

Roughly 500ppm equals 1 EC. therefore, 300ppm equals .6 EC, 250ppm equals .5 EC.

tap water is normally about 300ppm, when you add nutrients- obviously the ppm will raise.

oh, that makes sense... so how do i know which one is right for my plant?

haha

maybe its time to get a little basic high school chemistry, physics, or biology. ....or do they still teach sciences in high school??

If you are new to learning about PPM or EC you should not bother with PPM, because there are 3 different conversion tables they use, and when you are trying to communicate information to peeps online it gets confusing. EC is a constant number that is used, and using the 3 different tables they get the PPM

sorry mississippi steve. i took all those courses, i must have not been paying attention or something. so i still don't understand how much im supposed to give my plant. 1/4 strength while its young right? so does that just mean i take the maximum (1800) ppm on the chart and devide it by 4 and thats how much i give my plant?

You don't want to start nutrients while the coteldons are alive (the little round first leaves)

once they shrivel up and die, then you can start 1/4 strength nutrients. If the box says 1 tsp for the stage your in, use a 1/4 tsp. After a week of 1/4 strength, go to 1/2 strength, and then finally to full strength a week after that.

Quote:

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Originally Posted by Illusion

Parts per million (PPM), and Electrical Conductivity (EC), both the same thing, two different units of measurement.

Americans tend to use PPM more often, and europeans use EC more often.

You need a TDS electronic pen reader (Total dissolved salts) which tell you the PPM (parts per million) of the TDS of the water.

This is how you know how strong your nutrient strength is.

Roughly 500ppm equals 1 EC. therefore, 300ppm equals .6 EC, 250ppm equals .5 EC.

tap water is normally about 300ppm, when you add nutrients- obviously the ppm will raise.

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The tendancy of using PPM comes from industry standards. If you pull out a NIOSH pocket guide, or any MSDS, most all of the measurements (including IDLH, and weighted averages) are expressed in PPM.

Im sorry I feel like an idiot. All my container shows is the ppm chart. I guess my real question is how i determine how much to give my plants based on that ppm chart.

Sensi Grow (Part A & B) this link will show you everything that is on my container.

Here is a picture of the plants if that helps.

http://img151.imageshack.us/img151/4774/dsc00182zm1.jpg

http://img352.imageshack.us/img352/7476/dsc00181tk9.jpg

Here Sjaap plug your info in to this Chart

thank you so much. that is exactly what i needed