I have be fighting some sort of brown stuff in the botton of my vinyl pool avg.that is oval 18x33.I have vaccum my pool 4 times this week.and have added 6 - 3 quart of bleach.not sure what is going on ,but I do know I'm tired of vacuuming.Please help,Im at the point of giving up and taking the pool down.Here are my test results.i'm using the PS233 KIT. question do I need to add more bleach.Thanks for all the help,I love this site

FC-10
CC-1
TC-1
PH-7.5
ALK-170
CYA-30