Here I go again. This time it is our 75 gallon. Background: 75 gallon; 60 lbs. live rock, assorted clean-up crew, a pair of tomatoe clowns, a tibeken angel, a yellow tang. The tang and the angel were added after the tank had COMPLETELY cycled. They have been residents for approx 3 months. The clowns were added about a month later. All have grown nicely and have voracious appetites. They seem to get along famously as they are almost always in close proximity of each other. We run an Aqua Remora Pro skimmer and a cannister filter, two power heads. The cannister is cleaned every 2 weeks. Water test show 0 ammonia, 0 nitrates, 20-30 nitrate. I have been dosing with ESV Bionic 2 part system to increase my calcium. As a kick start I have also used Kent Marine Liquid reactor. Salinity has been fluctuating between 1.021 and 1.023. We seem to be experiencing a lot more evaporation lately.
Now the problem. Yesterday the tang developed rusty colored blotches. They appear to be mainly concentrated where the fins meet the body. He shows no other signs of distress. I do not notice any rubbing or other signs. He is eating constantly as usual. He gets a mixed diet . Any ideas?
Now the problem. Yesterday the tang developed rusty colored blotches. They appear to be mainly concentrated where the fins meet the body. He shows no other signs of distress. I do not notice any rubbing or other signs. He is eating constantly as usual. He gets a mixed diet . Any ideas?