

Refills for pH and chlorine test kits.
1 x 30 cl Phenol Red for pH, and 1 x 30 cl Orthotolidine (OTO) for Chlorine. In screw-cap bottles
Note: This is double the volume supplied with the test kits.
Order more, or other items with this product to save significantly on handling and shipping costs.
Store in a cool dry place out of sunlight. Keep out of reach of children.