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Hard Water Schooling Fish


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From what I've read, a lot of the species of tetra should work just fine, especially the African tetras like the Congo tetra. Rainbowfish species in general originate from areas with harder water, so most Melanotaenia, Glossolepis, and Pseudomugil species should be fine as well. As always, it depends on the water parameters your local fish stores already keep them in. If local fish are already adjusted to harder water, they should be just fine in your tank. I hope this helps!

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