You don't have to be disabled for any length of time before you apply for Social Security disability insurance (SSDI) or SSI disability benefits. You are eligible for to qualify for SSD or SSI benefits as soon as you stop being able to do a substantial amount of work.
BETTER:TAYLOR DPD TEST KIT. This is the full battery of tests for any pool or spa. The K2005 test kit has 3/4 oz bottles, K2005C is the same kit, with 2 oz bottles. With either one, you can be sure that your pool water will be balanced, with accurate titration testing. Free & Total Chlorine to 5ppm; Bromine to 10ppm, FAS-DPD Titrant test.
Pool shock is either chlorine or non-chlorine chemicals that you add to the pool to destroy any contaminates in the water. The goal is to raise the free chlorine levels to a point where it will destroy any algae or bacteria growing in the pool.