Ultra cheap Ph test device

I've got one of those that I use when I'm working on my food plots.Never thought about using it for my tank.
Thats cool,guess I'll have to dig mine out.
 
I'll get my tester this weekend.I keep it at my parent place(where I hunt) so I know where its at.
 
The directions say insert in soil for one minute. I had to clean the rod with the pad, insert the rod in water almost to the plastic part and then slowly stir it the tank water for about 3 minutes before it matched my API Ph test.
 
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