I have had my Choc. chip starfish for just over 3 months now and he has been doing great i thought... This morning i woke up and noticed that where two of his arms meet is almost like it's "rotting"... The area im worried about is where his top right arm and bottom right arm meet, the area is whitish in color and really does not look good. PLZ help me find out what's wrong and how to fix it ! Also i don't know if this could be of any use but he sometimes goes up to the surface of the water and lets his arms go out of the water into the air ?!?
Water parameters are
Nitrate= 0 ppm - 5ppm never higher than 5ppm