hey Gman Good Morning ... i need your eyes for a second , what do read here? do you read the middle, or the edge ??? >>> thanksView Image
id go with 4 or 3 on that... to low.
if you want to spend the money, just a suggestion, ive had real good luck with the hanna grow line HI9814 or HI9813. i can score the HI9814 for about $170 locally. one of my buddies has the other HI9813 an loves it....