40 gallon goldfish tank ideas?

Fantail goldfish will fit perfectly inside a 40 gallon since they need a 30 gallon at minimum.also minnows would at swim at goldfish since minnows are way faster than goldfish they have a better chance of getting the food first.apple snails can live with a fantail goldfish with no problems.you can also add 1 or 2 panda corys since they can live in both tropical and cold water conditions.