I started opening our 24' ag pool about two weeks ago. We had an issue with mustard alge last summer so we left it and did nothing to it over the winter hoping to drain most of the water this summer. We decided not to do that however and started shocking it about two weeks ago. Since then the water has turned from swamp green to cloudy blue green. I have been running the pump and filter for 24 hours a day for at least 7 days and have not seen much improvement. I can still only see about a foot into the water. My question is what to do next. I do not know if I should continue shocking or possibly put de in the sand filter to help filter better. Unfortunatly I do not have test results right now. I am ordering a good test kit, but I do not have it yet. Right now I am just going by a 6 way test strip and a 2 way liquid kit. Any advice would be appreciated.