Add 2 gallons of chlorine EACH evening, till there's no more green. Test with an OTO / phenol red kit, till you have the K2006. Skip the chlorine dose if the 'yellow' is beginning to look 'orange'.

Circulating is good, if you can do it without filtering. Whether filtering is good, depends on your pump and filter. If your filter is too small for the pump, the dead algae particles apparently get broken up and forced through the filter. It's better to avoid this.