One of my fellow snow-belt pool owners hasn't listened to my warning about the need to perform a spring pre-opening partial drain because snow and rain replenishment raises the water level above the cover, and the result is a mildly green pool. The issue was discussed here.
I want to help the poor guy before the pool pro comes and opens the pool and starts the pump. Also, pool season here doesn't start until the end of May, so it may take some time before they actually open. Here's what I have in mind:
First we're pumping water out so that the cover, which is infested with leaves and other organic products, is no longer touching the water. Then we are going to shock to 20 PPM (I have no idea what's his CYA level, so I'm assuming 50) and use two submerged pumps for circulation. Is anything wrong with this plan, until the pool is opened? What else can be done?