Multifunctional Chlorine Tablets (Tri-Clor). The size of this product is 1 x 2Kg. (Trichloroisocyanuric acid dry) This is probably one of the easyest ways to dose chlorine to your pool and unlike normal Tri-Clor tablets these also come with an inbuilt water clarifier. (Please note that over time Tri-Clor tablets lower the pH of the pool water and therefore it may be necessary to adjust this by using pH Plus). Always read and adhere to the instructions on the pack and never directly mix chemicals. Don't forget, the price you see is the price you pay not a penny more. We sell chemicals cheap, not cheap chemicals!