Quote Originally Posted by piglet420
I just put together a new batch of nutrient and the PPM reading was 762 and the EC reading was 1525 with the water temp at 61C. Yes I know the water temp is cold, it's cold out in the garage (lol). With those readings, does that help me guess what I should be reporting or using as a feeding schedule? The Botanicare bottle says 600PPM...so I need to cut the nutes down with RO water, or is that not an accurate reading? Should I be using the EC? I can't find an EC conversion scale for the nutes I'm using? Any suggestions?

P
A reading of 1525 is the same as 1.5, it's the units that vary. 1525 would be 1525 µS. You said it read 762 for TDS, which is half of the 1525, so your conversion factor is 0.5. This is also why it was reading 1200 PPM when you wanted 1500 PPM.

I researched Botanicare to find what conversion factor they used for TDS and found nothing. I would e-mail them and just ask for the EC numbers or what conversion they used. You can also just use the recommended nutrients by volume.

Weedhound is an experienced grower and uses Botanicare. There is a whole post on the Botanicare regimen. http://boards.cannabis.com/hydroponi...ml#post1789167