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The vinegar bath did not help. Still jumping around from 10 to 14. Is this one any good?
Amazon.com : niceEshop LED Digital PH Meter Tester For Water Tank Aquarium Pool Hot Tub, PH Pen Tests Water Quality Tester, red : Pet Supplies
I have a Mudder PH / TDS meter. I went to test the water today and the meter wouldn't stabilize, jumping all over from like 8 to 19. Not sure if it needs new batteries or calibrated. Any ideas?
Thanks
Mark