These mulit-parameter test strips test for five water quality measurements on 1 strip: Free Chlorine, Total Chlorine, Total Hardness, Total Alkalinity, and pH (6.2 - 8.4). 50 test strips.
Marina 5G LED Glass Aquarium Kit, Slim S10 clip-on filter with quick-change filter cartridges, Long-lasting, natural daylight effect LED lighting module incorporated into aquarium canopy, Size: 41.2 cm L x 21.5 cm
Torque demonstration kit helps user to experience significantly increasing torque by moving a mass set down a rod while trying to balance the main rod. Includes: Storage Box, 1000g mass set, custom washer, 2 dowels, 2 bolts, 2 nuts, steel ball and instructions
Marina 5G LED Glass Aquarium Kit, Slim S10 clip-on filter with quick-change filter cartridges, Long-lasting, natural daylight effect LED lighting module incorporated into aquarium canopy, Size: 51.3 cm L x 26 cm W
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