How can you fix your pool if it is a really dark green after putting chlorine in it yesterday?

um... i would have to say, empty the water (if you can) then clean the pool spotless. Make sure all the tubes (jets) and filter is cleaned out and spotless again. then fill it up with clean water. run it for a day or two and then add the chlorine or and other chemicals you want. (That's the best i can say) or get a new pool.