Completed 3 system maintenance. Checked all of the electrical and mechanical components. Found all 3 blower wheels clean with good capacitor. Added algae tablets to downstairs pumps. Cleared out upstairs drain line. Changed all 3 filters. Cleaned off all 3 outdoor units with a basic chemical wash. Units have good pressures and good electrical components. Recommend surge protectors for all 3 systems. Systems are cooling at this time.