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.
Bromothymol Blue is a liquid indicator that can detect presence CO2 in water. It changes color from blue to green, as it detects the presence of the CO2. In very acidic conditions it will turn yellow. It has also been used as an indicator in the NCO (isocyanate) test (where di-n-butylamine is the base and 1N HCl solution is the acid. Green is the endpoint in this titration and yellow is over-shot.