Hi,
Got 2 red and white ryukins. For one ryukin the red color is becoming more darker and also it is getting some black folor lines over her fins and tails. And for the other ryukin the entire red color is fully vanishes becomes white now. Whats the reason for this? Both are kept in same tank and under partial sunlight falls everyday. Feeding them live blood words daily, frozen worms, pettets, some times tetrabits(discus) also. Using well water. Its a 4 feet bare bottom tank changing 30% wc every 2 days. Any suggestions for these color changes will be appreciated.

Cheers
Stars