Algae is still probably consuming chlorine.
Keep the FC at the upper end of the slam level. Dont let it get towards the lower level or below. That will extend the slam.
Are you brushing frequently? Running the pump 24/7?
Clean the test vials with bleach or alcohol.
Keep the FC at the upper end of the slam level. Dont let it get towards the lower level or below. That will extend the slam.
Are you brushing frequently? Running the pump 24/7?
Clean the test vials with bleach or alcohol.