t1a1c1h
New member
We have a 90g mixed reef tank with three bangaii cardinals which have been in for about 5 months. Now the female is turning brown. Its behaving normally, eating well, not getting bullied as far as we can see, but it's back and tail have taken on a reddish brown hue. Is it a disease? Part of the mating process? Or something else?! Tank mates are 5 blue star damsels (newest addition 2 weeks ago), pair of clowns (6 months ago), pair of orchid dottybacks (3 months ago) and a purple firefish (4 months ago). Everything was quarantined a fortnight before being added. Params: nitrates 5, phosphate 0.1, ammonia 0, ph 8, alk 7.7, calcium 415, mag 1260, sg 1.025, temp 24.6.
