I've finally had it with granular shock and chlorine pucks and the like. After getting some green algae growing I've decided to make the switch to the BBB method.

I have just about drained off 12" of water at this point (since my CYA and Calcium levels were high - see earlier posts). Should I refill to normal levels first before I add some bleach the kill off the algae? I'm guessing the correct thing to do is refill, test the water and act accordingly.