Just pulled off the winter cover. I have a 40k gal gunite pool. I ordered a SWG yesterday to make the switch from chlorine to salt. What is the best way to open the pool? My cya levels were extremely high at closing so I emptied 1.5' of water out and let the pool fill up over the winter naturally. It is a dark green pond at this point and with the amount of rain we have had recently the local worm population made abee line to it. I have begun filtering and using the robot vacuum to remove the solids. What is my next step keeping in mind I am putting in the SWG later this week. I have not done any testing at this point. Thanks George