JUST SPOKE TO A GUY FROM CHEMICAL COMPANY AND DID SAY THEY DON'T USE REGULAR WATER IN LABS .THERE IS COMPOUND IN IT THAT ATTACKS HARD WATER BUT ALSO SLOWS CLEANING.THIS GOOD THINK KEEP MIND.I USE TO STAIN CONCRETE AND DYE FROM CO. SAID TO USE DISTILLED OR REVERSE OSMOSIS FOR IT TO WORK .WATER CHANGES FROM MANY AREAS BETTER BE SAFE ,BRING WATER .