Hi this is my first post. Got 2 new puffers baby's yesterday. Came home not eating not happy. Just done emergency water change at 12.30 at night. Wouldn't be able to sleep otherwise. There in a 130 litre tank, fresh at moment but going to change gradually to brackish when I can home my candy cane plec. Hope water change works may do another partial one tomorrow and clean filter. I love my new guy's.