Blockage-free irrigation with PeKacid 0-60-20 fertilizer Alkaline and hard irrigation waters are difficult to manage due to its high contents of bicarbonate, Ca and Mg which easily create insoluble compounds causing clogging of the irrigation system. Insoluble Ca and Mg compounds will not be formed if pH of irrigation water is kept continuously on the acidic side. Therefore farmers normally add acids to irrigation water in order to reduce water pH. The same result can be achieved by using PeKacid™, and no additional treatment with hazardous liquid acids is required any more.