When Do Baby Goldfish Turn Gold?

A goldfish's color responds to light, and does not depend on age. If a fish is kept in the dark it will get lighter, losing much of its color over time. For a true gold or simply your fish's brightest, healthiest color I suggest giving it full spectrum light. As they are outside, you are already doing that with natural light.

Diet plays a role in color, shrimp and fish meal will also help bring out a goldfish's color.

However, color variations that you are describing seem to be more along the line of the fish's dna rather than anything that can be changed with time, light or diet. I think you simply have dark fish.

It depends on the light

Ihave three goldfish for over 3yrs now. Off late one fish got white spots on its fins....I thought it was bacteria since my other fish died looking like that. So I decided to just gently scrub the fish to which small balls fell off. I came on the internet to check and then realised they were eggs and quickly seperated them .
My female fish is still sitting dwn in one corner. Is it ok to keep the eggs seperated. And what abt the female fish.