WHICH CARD TO READ LOW PH OR HIGH PH CARD???

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Candiru
MFK Member
Jan 31, 2007
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WANTING TO CHECK MY PH WHICH CARD DO YOU USE LOW OR HIGH..THIS IS FOR FRESHWATER.

I HAVE NO IDEA WHAT MY PH IS.
 
Run both tests. If the low pH is maxed out, it will change to the highest color in the range and stop. The high pH should shift somewhere within its range. Or the opposite could happen.
 
I would go with high ph. On the low ph doesnt it end at 5? or is it 6?
 
No the low ph goes up to 7. But i would say do both tests... then round it off.
 
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