QUICK! I'm trying to make a bleach solution to kill algae, but i don't know how to do it. I just bought a 7th generation bright green chlorine free bleach, but now it's telling me that its a solution of bleach. So how to i make a solution of bleach out of a solution of bleach? can someone please tell me? I need to know like asap. here's the sight with the exact information, but i don't know what it means. http://www.seventhgeneration.com/files/assets/pdf/msds/English/Chlorine_Free_Bleach_MSDS.pdf under concentration, i don't know what that means. why can't it just say 10 % solution?