ph tester question?

for a soil grow will once of these work http://www.4hydro.com/growroom/hicheck.asp

or should I just get the test strips?

Both are very inaccurate. My friend has the meter, and he threw it away within the first month. Ph is such an important part of a plants diet that the money spent on a really nice meter will definitely pay itself off within the first harvest (assuming you are doing more than a few plants). I use the blue lab guardian monitor and I have become best friends with it. I literally talk to it sometimes, and thank it after every use. It's a bit pricy but it's one thing in a grow room I will always recommend to people. Anyways, my friend brought his meter over and it was off; not by much but enough to make a difference on the reaction of plants to their nutrients.

some checkers are junk. Never heard of that one but looks legit. Checker > strips imo.

look at these kinds

http://www.hannainst.com/usa/prods2.cfm?id=040003

Blue lab blue lab blue lab! You will never look back