Felwin

Where can I buy a test kit like yours in Thailand ?

Hi, I have a salt water pool. After 2 years letting a company taking care my pool and realizing their strategy was to make it an acid pool to stay clean, I decided to do it myself. Was not able to raise the chlorine level enough to prevent algae until I finally put Cyanuric acid (CYA). Now my swimming pool is looking good, have the recommended pH and enough chlorine to stay clean. Also the pH stopped raising all the time which is great. Problem is, I now need to test my CYA level. I bought test strips on Lazada and they just don't work (pH stay at the lowest, CYA stays on 0). Few years ago had similar issue with tests strip from a shop. I would love to buy a Taylor k-2006C or other good testing kit but just can't find any in Thailand and Amazon does not delivery this product to Thailand. So guys, how can I test my CYA ? (would also like to test alkalinity, hardness, and even free chlorine) If you know how to get test kits or no so bad tests strip, I'd love to hear. Thanks for your help.