i lost a blue light torch a couple days back from polyp bailout due to me not keeping on a consistent schedule with water changes and everything essential. I recently got a 125 gal and that’s been my focus recently. I did a solid water change, i started dosing magnesium since it was low as 1225, i noticed this brown filment on my black light torch and have no idea what it is.. I did an iodine dip on all my euphyllia and just wonder if this is excess or do i need to do a kfc dip?