Currently have 15 freshwater running, 2-75, 1-55, 1-50, 3-40b, 1-29, 3-20L, 3-20t, 1-10 and currently building my 75 sw with a diy 40b sump. Pre COVID I had 3. Had to convert my basement family room to a fish room, complete with tank racks. I also have empty 65, 40, 29, 2-20s and some 10s. Water change day is a full day. Just a slight problem. My wife wants me to call the number to “have you lost your mind”