Don't use any more of those packs of trichlor. They have CYA in them and your CYA is high enough. Also no dichlor powder (also has CYA) and no cal-hypo because your CH is WAY too high. Best to stick with either liquid chlorine from the pool store or bleach.

You are three hours behind me so still early evening where you are. Go ahead and test your chlorine this evening and then test it again in the morning within an hour of sunrise so you can compare the numbers. That will tell us if you are losing chlorine overnight which would be a sign that you are fighting something in the water.

Did you read the CYA/Chlorine chart I linked above? If not, please do so and also order that K1515 add-on kit. With a CYA of 80, your normal chlorine levels will have to be between 5-10 ALL the time. If you drop lower than 5, you risk an algae bloom. Your K2005 can't test high enough but the add-on kit will give you that ability.