Lab Hard Water Vs Soft Water Is There a Difference? Background-Water is a universal solvent. Natural water contains minerals necessary for all plants, animals, and people. The content of minerals decides the water quality and hardness. The degree of Hardness is measured in PPM calcium.(www.ci.long) Soft water contains less than160 PPM, slightly hard water contains 160-320 PPM and very hard water is above 460-PPM. The advantages to hard water- healthy to drink …showed first 75 words of 759 total…

…showed last 75 words of 759 total…and marker as to which is soft, hard, and Poland Springs water. 4) Water each pot with equal amounts of water one with hard water, one with soft water, and one with Poland spring water. ½ a pint for each container 5) Put all three in equal sunlight (place right next to each other on a window sill 6) Water every other day with equal amounts of water; if the plants need more water give them all equal amounts!