I just moved into a house that has a pool. I am in a very sunny climate (actually in the Caribbean) and the pool is between 25-30,000 gallons. When I arrived the pool was so green it looks more like a yard than a pool. a bunch of bleach had been dumped into it and shock but nothing changed. We then use some yellow algae killer and shock and it went cloudy but mostly blue. Here's the tricky part. Because I live in a country with poor infrastructure I don't have electricity all the time so I can't always run my pool pump. after hurricane Isaac went through I didn't have power for 10 days and ALL the green came back. I was reading on the pool school that CYA levels should be about 50. mine are WAY higher than that, about 150 and it isn't registering any chlorine even though we added a bunch and I have tablets in the basket. So that' the situation now here's my questions. Feel free to answer questions I should have asked but didn't as well.
What do I do first? Should I kill the algae and then vacuum it to waste, then replace the water that I lose? or do I need to lower the water level before the algae is gone? I would like to get rid of it as quickly as possible.
It costs me $50 for about 3000 gallons of water so is there a way to get the CYA number down without loosing a lot of water?
If I am successful in clearing up the algae with something like yellow out will the problem come back due to the high cya level?
Can you recommend something long term that would help me avoid problems due to turning off the pump for extended periods of time?
Thanks for all the help and the great database of information I've already learned a lot.