I have a 20 gallon long quarantine tank that has a small niger triggerfish. I am looking to buy a 2.5-3 inch tang, 2-3 inch pufferfish, and a 2-3 inch dwarf angelfish. I was wondering if I could put all of those fish in with the quarantine tank without ammonia going up. I can do as many water changes as needed. I also have a 5.5 gallon quarantine tank I could put the puffer or angelfish in. I would just buy a bigger tank but I have no room and not enough money and my parents said no more tanks. So can I put all of those fish in a 20 gallon long qt or put one in a 5.5 gallon and the rest in the 20 gallon long qt.