i cant think
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It’s why I’d love a nano I can just run at room temperature and nothing special.They're "coldwater" species and known not to do well in our tropical reefs, so they're not very common anymore, but Matsu Collections says they offer both (Lythrypnus dalli and Lythrypnus zebra).
These fish are very tolerant and can be in warmer temperatures during summer but obviously should go back to cooler temperatures in autumn-spring.