fluorescence

Hello fellow saltines, So I just got a beautiful frag of gsp that I have isolated on a rock island. I tried taking a picture of it but the fluorescence doesn't come through. It was taken under blue light. Do I have to take the pic under white or do I need a filter or calibration of my camera or...

Hello, today I noticed the coraline on the back of a snail turned bright fluo pink. It used to be purple like on the mussel shell behind it. Have you seen fluorescent coraline before? Could this be caused by low PO4 levels (~0.06 ppm)?