I've been growing 6 white widows for about 2 weeks now and since this is my first grow and i'm still learning, i'm scared to death i'm going to kill with over water. I don't trust myself since i'm so impatient to do the 3 inches down test for moisture lol. My problem now is that I can't find a meter. I've been to lowes, walmart, target, and NONE. None anywhere lol. I want to order one online but don't want to spend alot and can only find these gimmicky looking things like ladybugs and frogs. Are those good? I don't want to waste money ya know? Any tips on what to get and where would be awesome.