Reply To: Daft solar hydrogen alpha questions › Forums › Sun › Daft solar hydrogen alpha questions › Reply To: Daft solar hydrogen alpha questions 12 March 2024 at 12:42 pm #622137 Kwong ManParticipant Hi, I am not totally sure, but it could act like a blocking filter function (cut out UV light). I would check with the manufacturers, Lunt. I am not sure if you need to be cleaning that ! Kwong
