Hi Everyone,

I'm working on a bioluminescent dinoflagellate aquarium for my
appartment. Dinoflagellates require proper light/dark cycling for good
light output, but seeing as i want this to be something of a coffee
table thing in a well lit room, i need to be able to block light
without physically throwing a box over it every 12 hrs. My solution to
this was to design the aquarium as a jacketed pyrex tube (just to give
an rough mental picture, the device would be similar to an upright
liebig condensor in overall structure). My idea for controlling the
light cycle is to have two immiscible solvents in a reservoir; one of
which would be transparent to photosynthetic wavelengths of light, the
other would be opaque. Obviously, the choices for the biphasic system
are either:

water & hydrophobic dye mixed with a high boiling point, non polar
solvent

OR

hydrophilic dye in water & high BP non-polar solvent

My problem is, i know NOTHING about dyes :)

The properties that the dye must possess:

Hi Everyone,

I'm working on a bioluminescent dinoflagellate aquarium for my
appartment. Dinoflagellates require proper light/dark cycling for good
light output, but seeing as i want this to be something of a coffee
table thing in a well lit room, i need to be able to block light
without physically throwing a box over it every 12 hrs. My solution to
this was to design the aquarium as a jacketed pyrex tube (just to give
an rough mental picture, the device would be similar to an upright
liebig condensor in overall structure). My idea for controlling the
light cycle is to have two immiscible solvents in a reservoir; one of
which would be transparent to photosynthetic wavelengths of light, the
other would be opaque. Obviously, the choices for the biphasic system
are either:

water & hydrophobic dye mixed with a high boiling point, non polar
solvent

OR

hydrophilic dye in water & high BP non-polar solvent

My problem is, i know NOTHING about dyes :)

The properties that the dye must possess:

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