I have been maintaining a 40 breeder donated by @tankguy at Katherine Michiels school in the mission sf for several years. I recently set up Geneva’s old 120 gal, and hopefully the students will be updating this journal to keep track of our progress. It’s currently cycling with rocks that had been dry (thanks @fishdoctor) and adding some live sand, a heater, and a circulation pump today. The tank was setup as a peninsula with no sump and had two hang on back skimmers at Geneva’s. I considered drilling the tank and using a sump, but decided to keep it simple and set it up again like it used to be.