Traditionally, goldfish are raised in ceramic tubs in China. I am following such tradition. I don't use a glass side-viewing fish tank for my goldfish. I just use a 20 gallon beautiful decorative tub for my 4 small fantail goldfish. The outside has very pretty traditional Chinese ceramic decorative patterns. The inside is pure white. The fantails looks really nice when viewed from the top.

I put a power-head and sponge filter on the bottom and some decorations for the fish to swim around. The bottom has a few pebbles for decoration. I don't have a under-gravel filter. I kind of like the white bottom of my tub which provides good contrast when I view my fish from top-down.

Has anyone here some experience in such an aquarium arrangement? Do you see any problem with my setup? Will the lack of a gravel filter be trouble? What can I do to improve my tub? Any advices are welcome.