Don't let your husband completely empty out the fish tank and forget to add the chemicals to help restart the aquarium or you will end up with belly up fish. But, if you have to learn the hard way like I did, here is a fool-proof way to avoid explaining this traumatic experience to your children.
Tell your children you had to take the fish to the fish store to be cleaned and that they would return before the night was over. (You better hope like hell they have the same exact looking fish at the store).
This morning Cody texts me that the girls' fish died before I was even awake. I had to explain to Addyson that her fish was hiding in the house or pirate ship all morning and afternoon long, but we would for sure see them before they went to bed.
Of course, there was not one more pink fish so daddy had to bring home a yellow fish. What was the excuse this time? "Your fish got sick, shed her pink skin, and turned yellow. But, she is all better now. And looks even more like Rapunzel and her blond hair."