Knowing that I had no plan to put enough energy into a sps dominant tank, I'm happy with what I have and get complacent. I don't think I lost a single coral. One eve my wife says the fish are acting sluggish. The tank looks a bit off. I checked salinity and alk (all I test at this point still) and make small adjustments. I did a WC and checked all equipment. Everything is normal. I suddenly realized that I wasn't maintaining my RODI again! I got a TDS meter and it was 80 ppm. Feeling stupid, I decided to take some time and do a full checkup. It turns out my heater probe failed. It was reading the temp I had it set at but the tank was actually 5 deg lower (73F). I verified with several thermometers. I ran out of outlets when messing around with the fuge and algae scrubber so I pulled the 2nd heater out. Luckily these are easily remedied. Now I feel really stupid and it gives me motivation to up my game again. This was about 2 months ago.