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Originally Posted by Fizzler
Do I actually need more corys. Do they actually do better as in be healthier with more? And would it matter if I mixed types of corys or do I need all the same ?
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Corys will certainly be happier and therefore healthier in a group. 6 is generally recommended. You also wont see their natural behavior with only 2. They are my favourite fish and i love watching them group up and run around the tank in a playful manner.
They dont have to be the same kind, they will school with whatever is available, but its better to have a like group.
They might not like your substrate though. Is it a nice smooth gravel or does it have sharp edges to hurt their barbels?