Hey where are you in WI, I am in Green Bay.

Anyway now that the algae is likely under control you can drop the Chlorine levels back to 3-5 ish for normal use depending on the CYA level, but since it sounds like you have none 3-5 is good to shoot for right now. Was the "frog" a floater that you dropped sticks in to and it just floated in the water or what? I would start using them if you have them it will reduce the amount of liquid chlorine or bleach you have to add since it slowly dissolves releasing chlorine in to the water. It will also add stabilizer as it dissolves. Just keep checking the CL level for now.