Hi Luis, welcome to the fourm

! Sorry about the loss of your golffish.
I think your tank decorations look good.
I really must point out though, that goldfish need 20 gallons per goldfish. They grow too big for a 10-gallon tank, and are big waste producers.
Is there anyway you can upgrade to a 20gallon tank. If not, may I suggest you take the goldfish back to the store, in exchange for maybe another tetra, it would be the best thing for the fish, because honestly he won't be happy in a 10gallon.
Tell us more about your tank Luis . How long have you have it up and running ?