How we bring it back
First a test, because the chemistry decides the plan. If stabilizer and phosphates are reasonable, we treat it: shock, algaecide, brush, filter around the clock, vacuum to waste, and clean the filter as it loads up. Most pools clear in three to seven days.
If stabilizer is very high or the algae is black, a drain and acid wash can be cheaper and faster than fighting it. We'll say which.
