A collection of 10 pH Buffer Powder packets. Contains 5 pH 4.00 packets and 5 pH 6.86 packets. Those are used to calibrate pH meters, and will also be used to watch pH ranges in aquariums or swimming swimming pools.
10 pH buffer powder packets
5 pH 4.00 packets
5 pH 6.86 packets
Used to calibrate pH meters
Can be utilized to assist reveal pH ranges in aquariums or swimming pool