I live in Pa and was planning on getting my 5000 gallon pond running again at the end of February. I was going to start with a water change of about 500 gallons then add micro lift sluge away. I do have two bogs. Should I wait to add the micro lift until later in the spring? I also do weekly water changes of about 100gallons. Is this depleting my micro lift additive? Can you please recommend anything else for me to do or alter my ideas? I have all types of fish ranging from minnows to catfish to Koi. Thank you for your help