PPM/PH/TDC/EC meter and nutrient ??

i bought a hannah instruments handheld PH meter and a temp/ppm meter from some cheapo brand.

I just got a Sunleaves 4 in 1 meter on Amazon. Pretty impressive for the money ($25.00). It feels like a solid heavy piece of equiptment, nice clean digital display also. Seems to be very accurate and consistent.... time will tell. Anyway, it had good reviews so I got one.

If you are doing the lucas formula, i really suggest you read over his website for info. Really worth it

http://www.asklucas.com/