Will the size of substrate matter with goldfish?
Currently I have nothing in the tank but bare glass. I really want to add something like the sandblasting sand mentioned in another thread. However they said that the size of the stuff is about 1mm in diameter. Is that okey or will I need something larger such as gravel?
This is for ryukins. TIA.
Currently I have nothing in the tank but bare glass. I really want to add something like the sandblasting sand mentioned in another thread. However they said that the size of the stuff is about 1mm in diameter. Is that okey or will I need something larger such as gravel?
This is for ryukins. TIA.