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.
A pool water test kit is an inexpensive way to test the pH of your swimming pool. If you have a pool maintenance pro who is doing regular, routine cleaning and maintenance of your pool, they will certainly be doing this testing for you as part of their services. However, if you want to save money you can do it yourself.