I use pH meters in my business and I agree with others here. They are a pita to keep them calibrated and they are expensive and don't last long. Made in china , so just get some pH paper strips, they will do what you need for ponds.
Tracy
What is your business if you don't mind me asking?
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Tracy
Do not judge me by the politicians in my City, State or Federal Government.
, so just get some pH paper strips, they will do what you need for ponds. 
