Quote:
Originally Posted by raiderman
yea and tester to ,sorry,one not to expensive,thanx.and i'm a soil grower indoors and this is sufficient/
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They have a tester pen from hanna that is cheap but it is very fragile,you have to take care of the electrode and keep it hydrated with a storage solution,you have to keep them all hydrated but this one is especially sensitive here is a link
http://www.eseasongear.com/hannahi98103.html