Jac (majesticjac) wrote in thequestionclub,
Jac
majesticjac
thequestionclub

Ultimate question: How important is it for a fish tank to be filtered?

Detailz: My mom has a goldfish that she keeps in an unfiltered bowl. The bowl is cleaned often enough and the fish has lived that way it's whole life (which is, seriously, about 7 years). The fish has continued to grow, however, and the bowl is getting small for it. I'm wanting to move it to a tank that we've had from older fish. (I pulled it out of the attic and cleaned it out already, and have it filled with water.) Seeing that the fish has been fine w/ unfiltered water, I assumed it would be fine in the larger tank with unfiltered water. But I really do care for the livelihood of this fish and would hate to somehow accidentally kill it. So I'm here for recommendations...do you know if the water would affect it differently when there's more water...? When we change the water, we let the water sit for a day so the chlorine evaporates, and let the water become room temperature, etc.
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