We've just opened the pool after it's winter hibernation, and this is what we found.
OK, it's always a bit dirty under its protective tarpaulin, but this year it was totally GREEN. I'm not sure quite what happened, but I imagine too much 'light' was getting though.
We've put in the chlorine shock, and a load of anti-algae stuff, now all we can do is wait to see if it will die off and settle on the bottom, ready to be vacuumed.
I had a quick look at the temperature of the water; it was 16 C...... Brrrrrr.
Next job; clean all the surrounding flagstones. As you can probably see, everything is filthy!