Background: over 40 years experience with tropicals. Bred and kept angels and discus. Huge water changes correctly done, not an issue, I've always preferred an overstocked tank.
I've got 6 young fancy goldfish in a 40 breeder. None exceed 6-8 inches at maturity. No other fish in tank. It's lightly planted with plants goldfish generally leave alone, except the top is all duckweed, which I maintain as they devour it. The bottom is covered in 2 inches of glass marbles. Tank is kept at 65* fall/winter/ spring, then 75* in warmer months.
I realize it will be awhile before fish size and tank size become an issue, but is this do-able?
I've got 6 young fancy goldfish in a 40 breeder. None exceed 6-8 inches at maturity. No other fish in tank. It's lightly planted with plants goldfish generally leave alone, except the top is all duckweed, which I maintain as they devour it. The bottom is covered in 2 inches of glass marbles. Tank is kept at 65* fall/winter/ spring, then 75* in warmer months.
I realize it will be awhile before fish size and tank size become an issue, but is this do-able?