, you are not currently "over stocked". However, let your water parameters answer that question for you. Can you post NH3
? You may even have room for another small fish. Water changes can be adjusted according to test results. I do recommend upping your PWC
to 12-15gal every tow weeks.
You do need to evaluate your feeding, especially with the tangs. Frozen brine shrimp is not the best option in terms of diet. There is really no nutritional value to it. Your fish need a much better mix of meaty and veggie foods. I recommend mysis shrimp, krill and clams, as well as spirulina flakes and hanging nori or dried seaweed strips in the tank for the tangs to graze on. When you prepare your frozen food, let it thaw and rinse it in RO
water or a little tank water. Adding supplements like Vita-chem, Selcon and garlic are also very important to the overall health of the fish. You might also consider alternating frozen food with a good quality flake, I like Prime Reef by Ocean Nutrition.