On Wed, 29 Mar 2006 21:05:34 GMT, Altum wrote:

I love feeding color enhancing foods. They usually contain a lot of
carotenoid pigments and/or algae. Fish must obtain carotenoids from
their food - they cannot synthesize the pigments themselves, although
they can interconvert them. Carotenoids produce the green-yellow,
yellow, orange, and red colors, and they're mostly synthesized by plants
and algae. The more pigment you feed your fish, the more it can store
and the brighter the color gets. Carotenoids commonly occurring in
freshwater fish include beta-carotene, lutein, taraxanthin, astaxanthin,
tunaxanthin, alpha-, beta-doradexanthins, and zeaxanthin.

I used to feed color food to my African cichlids and I had amazing,
yellow-orange N. leleupis. I brought some into a store to sell, the
fish manager was amazed. I also recently switched to TetraMin color
flakes from the regular TetraMin. My gold white clouds went from pale
gold to a rich, orangey gold. My koi angelfish also went from yellow to
orange and developed more areas of color. I've always used color
pellets for my goldfish, and the little sarassa comets I bought recently
have turned from orange to a much deeper red on the color food.

A commercial example of color feeding is salmon flesh. Wild salmon have
bright pink flesh from eating shellfish which are rich in astaxanthin (a
carotenoid). The shellfish get it from eating algae, which produce the
pigment. Farmed salmon must be colorfed to get the flesh looking pink
the way people expect. Flamingos are also pink from eating
astaxanthin-containing algaes.

I think you would be very happy with the results of a color food in
restoring color to your faded fish.

I once heard that they could turn whites to pink, sounds like you haven't
found this to be so? Last thing someone wants is a red & pink koi, how
clashing. ;o) ~ jan


~ jan/WA
Zone 7a