{"product_id":"hanna-instruments-hi-38904-pool-line-quick-total-hardness-chemical-test-kit","title":"Hanna Instruments HI-38904 Pool Line Quick Total Hardness Chemical Test Kit","description":"\u003cp\u003eHI-38904 test kit comes with 30mL hardness buffer, 10mL Calmagite indicator and 50mL plastic beaker with cap. Regular testing helps to eliminate salt deposits on the walls of pools and spas.\u003c\/p\u003e\u003ch3\u003eHI-38904 Total Hardness Quick Total Hardness Control Kit\u003c\/h3\u003e \u003cp\u003eHardness, or TH, gives the total concentration of calcium and magnesium salts on 1˚fH\/0.562˚dH hardness corresponds to 10 mg\/L (ppm) calcium carbonate.\u003c\/p\u003e \u003cp\u003eThe harder the water, the bigger the risk of calcium and magnesium salt deposits on the walls of the pool and spa. On the other hand, water that is too soft can be corrosive.\u003c\/p\u003e \u003ctable\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd\u003e\u003cb\u003eVery Soft\u003c\/b\u003e\u003c\/td\u003e \u003ctd\u003e\u003c\/td\u003e \u003ctd\u003e0-7˚fH; 0-4˚dH\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cb\u003eSoft\u003c\/b\u003e\u003c\/td\u003e \u003ctd\u003e\u003c\/td\u003e \u003ctd\u003e7-15˚fH; 4-8˚dH\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cb\u003eSlightly Hard\u003c\/b\u003e\u003c\/td\u003e \u003ctd\u003e\u003c\/td\u003e \u003ctd\u003e15-25˚fH; 8-14˚dH\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cb\u003eMedium Hard\u003c\/b\u003e\u003c\/td\u003e \u003ctd\u003e\u003c\/td\u003e \u003ctd\u003e25-32˚fH; 14-18˚dH\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cb\u003eHard\u003c\/b\u003e\u003c\/td\u003e \u003ctd\u003e\u003c\/td\u003e \u003ctd\u003e32-42˚fH; 18-23˚dH\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cb\u003eVery Hard\u003c\/b\u003e\u003c\/td\u003e \u003ctd\u003e\u003c\/td\u003e \u003ctd\u003eHigher than 42˚fH; Higher than 23˚dH\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003cp\u003eThe ideal TH for a pool water is between 10 and 20˚fH or 5 and 11˚dH.\u003c\/p\u003e \u003cp\u003eAll required materials are included with the test kit, such as the sample beaker, indicator and buffer.\u003c\/p\u003e \u003ch3\u003e\u003cimg src=\"https:\/\/www.hannainstruments.co.uk\/img\/cms\/Web%20photo%20HI-38904%20testing%20instructions.png\" alt=\"Testing instructions\" width=\"565\" height=\"762\"\u003e\u003c\/h3\u003e \u003ch3\u003e\u003cspan\u003eThe Importance of Calcium Hardness in Pools \u0026amp; Hot Tubs\u003c\/span\u003e\u003c\/h3\u003e \u003cp\u003eCalcium hardness measures the amount of dissolved calcium in your pool water with the recommended range being between 200– 400ppm.\u003c\/p\u003e \u003cp\u003eWhen Calcium hardness levels are too low the water can corrode pool and plant equipment as well as attack the grout in tiled pools.\u003c\/p\u003e \u003cp\u003eWhen Calcium hardness levels are too high, pool water can appear cloudy and excess calcium deposits form a rough damaging scale on pool surfaces and inside pool equipment, such as pumps and heaters.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eTitration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRange\u003c\/td\u003e\n\u003ctd\u003e0-80 TH**\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSmallest Increment\u003c\/td\u003e\n\u003ctd\u003e1 TH**\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMethod\u003c\/td\u003e\n\u003ctd\u003eCalmagite\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrdering information\u003c\/td\u003e\n\u003ctd\u003eHI-38904 test kit comes with 30mL hardness buffer, 10mL Calmagite indicator and 50mL plastic beaker with cap.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e**\u003c\/td\u003e\n\u003ctd\u003e1˚TH = 1˚fH = 0.562˚dH = 0.7˚eH = 0.2 meq\/l = 10mg \/l CaCO3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3\u003eDownloads\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.hannainstruments.co.uk\/modules\/teapotknowledgehub\/uploads\/en_hi389040_clp_2-68b6bdb901fba.pdf\" target=\"_blank\"\u003eSafety Data Sheet - HI-38904 Pool Line Quick Total Hardness Test Kit Part 1 (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.hannainstruments.co.uk\/modules\/teapotknowledgehub\/uploads\/en_calmagitesolution_clp_7-68b6bdf76f4c7.pdf\" target=\"_blank\"\u003eSafety Data Sheet - HI-38904 Pool Line Quick Total Hardness Chemical Test Kit Part 2 (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Hanna Instruments","offers":[{"title":"Default Title","offer_id":57640061010293,"sku":"HI-38904","price":21.38,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0574\/5511\/6439\/files\/hi-38904-pool-line-quick-total-hardness-chemical-test-kit.jpg?v=1791580086","url":"https:\/\/testallwater.co.uk\/products\/hanna-instruments-hi-38904-pool-line-quick-total-hardness-chemical-test-kit","provider":"Test All Water","version":"1.0","type":"link"}