Floc it! No, it's not some teenage slang term, it's a chemical that takes any floating particle in your pool water and settles it to the bottom. Flocculant is the full term and it's save my pool parties a billion times.
If your pool is green and you're having people over soon (even tomorrow) to swim in it, you need to act fast! So here is how I use Floc to get rid of algae.
NOTE: This will not kill the algae, it will only temporary remove it from your pool in case of a pool party emergency. You must kill algae by superchlorination and by keeping your pool chlorinated to keep the algae from growing back.
1. Buy a bottle of Floc from your local pool store. The big box retailers like Wal-Mart or Target might have it, but you're better off at the place that caters specifically to swimming pools.
2. Turn your pool filter to "Circulate" if you have a multi-port valve. You don't want this chemical passing through your filter, if you can help it. You just wanna mix the chemical into the water.
3. Pour the Floc in your pool. Make sure you read and find out how much you will need for your size pool.
4. Circulate the water for 2 hours and then shut off your pool. This allows the chemical to mix into the water and then stopping the pump allows it to start settling the algae to the bottom.
5. Check back in 8 hours or so and all the algae (and other particles) will be in a big cloud at the bottom of your swimming pool
6. Hook up your manual vacuum and vacuum out the algae off the bottom of your pool. Make sure you vacuum to "waste".
You may need to vacuum a couple of times because moving the vacuum around the bottom will kick up the cloud back into the water. If this happens, just leave it alone and it will settle again. I've used this method so many times because my dad never took good care of his pool and was always hosting some sort of pool party. I've also saved a lot of other parties for my customers. If you have other ideas or thoughts, please feel free to post them. If you would like more info about this method you can contact me at my blog.