So I finally got around

to a water change for the 55 gallon tank. It took 5 hours, and it was nastyyy. I changed out about 25 gallons, so it was a pretty big change. And of course I forgot that my knight gobies are brackish (bad ideaaa) and I filled the tank back up before adding more salt. So I came home from school and they were both dead. It was a great ending to a fantastic day.