Thank you for taking the time to help me. I have a 30 gallon saltwater tank. Ive had it for about a year and a half. Everything has been going real smooth until today I noticed my flame angel breathing heavy. I checked all parameters, nitrite and ammonia were both 0. PH was 8.3. Salinity was 1.26. The tank is 80 degrees. I have noticed he likes to swim in the bubbles coming from my protein skimmer. Is him breathing heavy an oxygen issue? Should I invest in a powerhead