Spring start-up, new year with chorline, HELP!!

The chlorine will kill the algae, and the filter will catch the debris and flush out when you backwash. It is best to get rid as much as practical- but you don't have to get every little piece.
It may cause your filter to need backwashed a couple times while completely clearing, but that is all!

thank you, the chlorine that I put in yesterday did just that no green,its getting there! Thanks everyone!