Ho Do I Know If There Is Mold In My House How Will I Ho About Keeping Rosy Reds For My Wolffish?

How will i ho about keeping rosy reds for my wolffish? - ho do i know if there is mold in my house

Hello,
I have a goldfish and wolf loves pink. I do not know how they keep well, because if I shoot a lot with Zach (my wolf), which are also worn. S is no other way to) (a cheap way, and I have a spare tank of ten gallons (single tank) is also there, like any other food, unless that force Wolf to eat live / dead fish ?