Yellow, eh... but how do we assume they are the most hardy because everyone has one?
When I say "hardy" I mean... less prone to ick or parasites, isn't skittish and gets along with tank mates, eats well, etc..
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20g BB Mixed Reef // Coralife 150w HQI // AquaC Nano // Koralia 1 & Seio 820 // Jager 200w // AC50
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