Rummy Nose Tetra
Rummy Nose Tetras are one of my all time favorite characins that I have kept. That being said,they are not always that easy to keep. You must pay close attention to their water quality, low nitrates and pH, frequent changes are needed with a good conditioner. If not keep in favorable conditions their normaly bright red will fade. Once acclimated to your tank they are an awsome fish. In my 75 gal the group of 13 are tight schoolers who very rarely leave each others side.
Hemigrammus Bleheri are the ones you see more often which is nice because even though they are not supposed to be as hardy as H. Rhodostomus they are considered the more colorful of the two as the red coloration extends further back past the gills.
To confuse you even more there is a third spieces, Petitella Georgiae but it is less hardy and hardly ever seen in the US.
Buy as big a school as you can 10-12 would be best. One of the few fish that can be kept in Discus tanks because of their similer water requirements.
Picture of what healthy fish should look like.
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