The K2006 kit that Carl suggested can not be found locally but you can get it through this link:> http://pool9.net/tk/

What kind of shock have you been using --- cal-hypo or dichlor? Have you been using trichlor pucks? Both dichlor and trichlor have CYA in them. They are also both very acidic and will drive your pH down. I have a hunch that your CYA level is high and you aren't running high enough chlorine levels to keep the algae at bay. We see that scenario frequently here on the forum. You can read more about the CYA and chlorine connection here:> http://pool9.net/cl-cya/

Get a kit and post current readings. Also, tell us exactly what all you have put in your pool meaning ingredients and not just product names like 'algaecide' and 'shock.'

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