I would like to recommend a specialized ranchu feed from Japan. The feed is calld Fry Feed Kyowa N700 or just N700. The same company also made standard feed for ranchu call C700 which is slightly less expensive. The feed is suitable from small fish all the way to adult size. I have been using this feed at home for the past year for all my adult fish instead of red worm and it has worked amazingly. Try it out ok.

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