submersible pool pump

The pool lay fallow for almost two years with the old pump left in the water. When we pulled it out, something was shorted. I took it apart (it's built like a brick outhouse). I can't find the short. So I bought a new one. I LOVE the new pump. Not only is it 1.6HP instead of 1.0HP, but most...

Our CYA is 134 ppm. I know we need to drain some water. One pool tech said drain 2/3 and add fresh water. Another tech said drain completely and do light acid wash. I decided to start my own research and found this thread. So — partially or completely drain? And recommendations for submersible...