Hi,
I got three 5"motoro rays about 3 weeks ago. They are in a 100g w/ wet/dry and sponge filters. heaters are in the sump. Tank has black sand. There are two 6" turushuki cats and 3 2" boesmani rainbowfish as tankmates. The turushuki cats have a small cave and keep to themselves. I do two 30% wc each week. Nitrates <10, 0 nitrite and ammonia.
I put a light on the tank and noticed that two of my rays have a lighter color--a whitish spot--right between their eyes on the tops of their heads.
I took a pic with my camera phone but it doesn't show up to well.
They are eating like pigs on shrimp, frozen bw, and occasional night crawlers. Any cause for concern?

I got three 5"motoro rays about 3 weeks ago. They are in a 100g w/ wet/dry and sponge filters. heaters are in the sump. Tank has black sand. There are two 6" turushuki cats and 3 2" boesmani rainbowfish as tankmates. The turushuki cats have a small cave and keep to themselves. I do two 30% wc each week. Nitrates <10, 0 nitrite and ammonia.
I put a light on the tank and noticed that two of my rays have a lighter color--a whitish spot--right between their eyes on the tops of their heads.
I took a pic with my camera phone but it doesn't show up to well.
They are eating like pigs on shrimp, frozen bw, and occasional night crawlers. Any cause for concern?

