Pool Lab Alkalinity M Photometer Grade Test Tablets for Testing Alkalinity (50 Tablet Pack)\n\nOfficial PoolLab reagent tablets for photometers including Pool Lab 1.0 and Scuba II.\n50 reagent tablets Alkalinity-M Photometer. Test For\n--Alkalinity\nTablets blistered in an aluminum push-through blister (10 tablets per blister). In a cardboard sales-box\nWhy Happy Hot Tubs?\n\n--Family-run business with over 30 years experience in the hot tub industry. \n--Great customer service, check out our brilliant feedback! \n--An industry leader. \n--A brilliant range of high quality, specifically-sourced products available to make your hot tubbing experience the best it can be!\n\nFeedback\nPlease leave feedback for us as soon as you recieve your item so we know everything is ok. Contact us if there are any problems and they will be resolved.\nPostage\nWe post our items using Royal Mail or DPD. Large and heavy items are sent!