Dyes may work great, but it's hard to tell. Blue water vs green or bluish green. Either way you can't see the fish, or at least their colors very well. So I've never understood the point to using dyes unless you just liked blue better than green.
It's interesting that the dye is suppose block UV. Algae do use a tiny bit of the UV spectrum most of UV kills algae. As in a UV filter. If all that is being blocked is UV that would help algae.
It's interesting that the dye is suppose block UV. Algae do use a tiny bit of the UV spectrum most of UV kills algae. As in a UV filter. If all that is being blocked is UV that would help algae.