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With the Universal Coupler Kit, two single mats can be transformed into a double bed. The two coupler kits attach to the top and bottom of the mats for a solid, gap-free connection. Different mat sizes are accommodated by the velcro-adjustable loops.

API FRESHWATER MASTER TEST KIT helps to quickly measure and modify the six aquarium levels that are most important to the health of your freshwater fish. These levels can change rapidly and create harmful conditions when fish waste, uneaten food or other organic matter accumulate, or when untreated water is added. The API FRESHWATER Master Test Kit measures these six parameters with scientific accuracy and provides professional results. It comes with four test tubes, a holding tray and computer calibrated, laminated colour card. Just fill the test tubes, add the test drops and compare results to the colour card. Then follow the recommendations on the card if action is required. Features: Helps monitor water quality and prevent invisible water problems that can be harmful to fish and cause fish loss Accurately monitors 5 most vital water parameters levels in freshwater aquariums: pH, high range pH, ammonia, nitrite, nitrate Designed for use in freshwater aquariums only Use for weekly monitoring and when water or fish problems appear