Pool Math Drills: 150 Original Problems Worked Through
Practice volume, gallons, flow and turnover math until the steps come out in the same order every time, with each answer worked through.
US$ 19US$ 9.90
Water Chemistry Practice: 120 Original Questions Talked Through
Test yourself on chlorine, pH, alkalinity, hardness, CYA and LSI with original exam-style questions, each one explained so you see why the answer is right.
US$ 19US$ 9.90
Chemical Safety Pocket Cards (storage, PPE and spills, printable)
Print and keep by the chemical room: how to store each chemical apart, what PPE to put on and what to do first with a spill.
