we have two fish in a tank that is 1" x 2" x 1.5 not sure how many gallons
it has a filter appropriate to the size of the tank according to the local
"pets at home" after a few weeks a greenish scum starts to build up on the
sides of the tank. I change the water about once a month. I put tap water
conditioner in and allow the temperature to equalize before I put the fish
back.
Am I doing something wrong.
On another note one of the fish is about 8 years old.....the other one about
6 years, how long do these things live. the thing is virtually silver now
which I assume is the goldfish equivalent of going grey