I kept 8 in a very heavily planted 10g without a problem. Just up the water changes.
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Not saying it wouldn't work... but honestly, if it were me, i would rather fill the 10G with say 3 Dwarf Puffers, 2X Otto Cats, and maybe a bunch of Cherry Red Shrimp... much better than having to always watch out for major aggression issues and you get to add a bit of diversity...
But thats just my take on it...
^ no doubt, with enough cover it could work out... Although im curious to know what your male to female ratio was?
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