No problem. You know candles are something I’ve wanted to look into. My sister in law gets sick breathing in lit fragrances from candles. My wife lights them every once in a while. It sounds like you’re on top of this. Another quick thought while I was reading your post was. Toxins from any soft corals in your tank. Fresh Carbon is a constant in my tank. Zoas, one Leather, Ricordeas. Toxins can’t be seen or tested for. Gotta protect those acros!No we don’t have cleaning people other than ourselves and we don’t believe in sprays because we fear it could harm our dogs the most I use is pinesol to mop the floors but nothing aerosol and I only use fresh ro water in a spray bottle to clean the glass with I have a skimmer and thought of maybe hooking one of my air pump lines to the skimmer directly I even placed the air pump outside of the stand to try and pick up more fresh air. I open the French doors in my office for a few hours a day on the weekends when we are home but sometimes it just gets too hot and humid in the house and my ac runs like crazy. I will have to pay more attention to maybe even the candles we light in the house? Would this cause a problem also? Thank you very much for you feed back it’s much appreciated!