3 weeks ago a used a spare sump pump to pump about 3-4" out to get the level down and the water was clear and the bottom was clean.
I took the cover off yesterday and there was a 1/16-1/32 layer of algae from the waterline down EVERYWHERE. I have a 'real' test kit ordered yesterday so all I had was the strips and everything was low. I dumped in 4-1.5 gallons of 6% bleach and a bottle of concentrated algaecide. I had time to brush the shallow end before calling it a night.
This morning where I brushed was clean and the water appears to be clear. Strip reveals everything ok, except pH and stabilizer are a little low. Leaving the pump running (I have to fly out today, return tomorrow night) and I should be able to brush the deep end before I leave.
Hopefully my test kit will be here when I get back!