Borax is okay to use with these products. However, both the trichlor and the dichlor are very acidic and are driving your pH down. Besides, the dichlor and algaecide both contain copper, and unless you want a metals problem to deal with. I would NOT allow that in my pool. ( BTW,copper is what turns dyed hair and fingernails green!)

To bring your Cl levels down, just stop adding chlorine-- the sun will take care of it.