bro, just a question, is the aircon still on during the weekends when nobody's working in the office? or even at late nite?
we used to keep a tank in the office as well and its quite hard to keep corals stable ... working hours is really too cold, i agree, reaching 20deg as well, but after work and during weekend, it is pretty warm.... so the corals experience extreme cold and extreme warm temperature, making it almost impossible to keep, especially sea anemones!!! solution we did is just do away with the corals, and keep damsels....