


My family has a 4-6 regular size hot tub out back and we used it once in a while. It was always tended to chemically and was regularly drained but theres this mold like algae growing inside of it. Especially around the top near the filter (probably because its stagnant over there). it keeps coming back although we have cleaned and drained it. Im suspecting the cover to be the culprit but i dont have alot of hot tub no how. Any suggestions?