I have a planted 55 gallon freshwater aquarium with a Fluval C4 and Fluval 407 filters on it. I've had the 407 for 2 years and have been very happy with it. I have it on full power with a spray bar extending the length of the tank with the spouts pointing downward and toward the back glass in order to reduce surface disruption since I'm injecting CO2 via a pH controller. I've very diligent with my aquarium and filter upkeep and have programed all suggested maintenance into a schedule on the Aquarimate app for my iPhone. This even includes suggested maintenance that Fluval mentions but most aquarists say is unnecessary. Anyway, yesterday morning the power went out at my house. I was about to leave and took a good look at the aquarium before I left when I fed the fish/snails. About an hour later, my wife texted me that there was a "fish tank emergency." The side of the 407, where the latches fasten, had cracked, and about 45 gallons of water leaked out all over my carpet. Luckily it's located downstairs. I lost one honey gourami who just seemed really stressed out afterwards and was found dead this morning. Anyway, I found an old post on here from a couple years ago asking if this had happened to anyone else, but it has since been closed for commenting. Most of the responses blamed poor upkeep, but I wanted to call attention that this happened to me after doing everything possible to keep the filter running smoothly. Luckily, it's still under the 3 year warranty. Does anyone have any thoughts on how to prevent this from happening again? I suppose it was just a fluke. The only think I can figure is to make the spray bar above the water to reduce resistance, but I really liked having it underwater to reduce the sound as well as surface disruption so that my injected CO2 doesn't just get gassed off. Actually, the end cap in my spray bar shot off when I started the emergency replacement 407 I ran out to get, so I turned the output down slightly so it would stay on.