Ranchu Goldfish tank mates
Carassius auratus
3 rated pairings from the Ranchu Goldfish care guide. Compatibility here means water, temperament, tank zone and adult size all line up — the note on each card says why. Ranchu Goldfish needs at least 20 gallons on its own; every companion adds to that.
Excellent matches
1 · Same water, complementary zones, no conflict.Good matches
2 · Compatible with normal care — watch space and numbers.
Gold Mystery Snail
Pomacea bridgesii
5 gal min · 2" adult · Peaceful
Peaceful scavenger that won't compete aggressively and helps maintain water quality
Ramshorn Snail
Planorbarius corneus
5 gal min · 0.75" adult · Peaceful
Small, non-aggressive snail that aids in algae control without bothering ranchu
Also recommended alongside Ranchu Goldfish
Species whose own guides list Ranchu Goldfish as a tank mate.
Planning this tank?
Run the whole stock list through the calculator — it checks bioload and schooling numbers, not just pairings.