What is the proper size cartridge filter for my situation?

[mas985]

You are sure that it is only dead algae, right? A filter will not eliminate live algae.

But before replacing your filter, put a cup or two of DE in the sand filter and see if that doesn't clear up the water. Some algae is smaller than what a sand filter can remove so sometimes it needs a little help.

Given that you close your pool for the winter and I assume that you have a green mess at opening, a cartridge may not be your best choice. Sand filters are perhaps the easiest filters to have during opening.

[mobilemike73]

well, I've been running very high levels of FC for several weeks now (10-30ppm), and the water is cloudy white and has been since I added approx 200 ppm of cal hypo (over 2-3 days) to the pool to kill off the swamp. Is it possible for the algae to be white and still alive?

[mas985]

Ok, so it sounds like the algae is dead. Then you might want to try the DE to see if that helps clear it up.

[Watermom]

More info about trying the DE in the sand filter can be found here:> http://pool9.net/de-test/