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07-04-2011, 08:37 AM
Ahhh! The stress test! In real life, zoanthids are often exposed to the air, wind & freshwater rain when the tide goes out. The peroxide dip at the base should have no affect and the epson salt dip (magnesium sulfate) should not do much unless the treatment was long enough and didn't kill the zoanthid. When they close up, they get pretty tight and do not allow much of the environmental factors to affect them, aside from physical attack and harsh chemical burns....then they slime and/or die.
Photoconversion and/or chemical oxidation may cause the chromatophore/fluorophore to shift their color appearance. One might argue that if several pigments are present and one pigment is inhibited, a color change may be visible due to the remaining pigments. By far, the easiest way to change colors on corals is to provide different lighting spectrum....actinics, sunlight, LED (usually in 465-485, 670, or 720-750 nanometer wavelengths). The colors of the corals change based on the excitation of the chromatophore from the wavelength of the supplied light.
Other potential ways to chnage their colors include a pH change, metal binding, chemical treatment, etc., however, conversion made through these types of conditions may not be sustainable in the long run as the effect of a pH change may impact other corals or livestock in your tank.
Keep us posted on your efforts as this is an emerging hobby with lot's to learn!
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