If you have ill treated a goldfish so badly and kept it in the dark for so long that it has lost its colour and gone white IMO you should not have a goldfish or any other kind of living creature to look after.. Common sense would suggest that given time the fish will return to its normal colouring. You certainly will not change a naturally white goldfish into a different colour.
the lack of light being in the dark
"Goldfish" colors range from white to yellow-orange to blue to black. White goldfish have no pigment cells.
no
the goldfish that is being chased might be a female goldfish where as the others are male goldfish, so the female one gets battered around the tank and the fins and tail might shred it is a good idea to separate the single fish so it wont be attacked. i know this cause my Goldfish do the same XD Look for white dots on the cheek of fish that r chasing the other one. if it does have white dots its a Male hope that helped :)
Not a goldfish anymore.
usually not but it depends on the type of goldfish
It is albino.
The white coloration on goldfish is significant because it is a result of selective breeding, and it can indicate purity and beauty in the fish. White goldfish are often prized for their aesthetic appeal and are considered valuable in the world of fishkeeping.
That is actually Excriment. It is him using the toilet.
The most effective goldfish white spot treatment available on the market is a medication called "Ich-X" which is specifically designed to treat white spot disease in goldfish.
take it out
white.. I think