Red Cherry Shrimp Breeding

Have any of you that own any RCS focused on breeding these, or have you just let them of their own thing? I’ve seen a bunch for sale with a higher grade (coloration really) that peeked my interest into getting a small group and then selling any of those that I would need to cull for cheap - just curious on how long before you may see a grade “increase” in terms of colors if you start with the lowest (cheapest) bunch.

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