Frontosa tankmates?

not really, a 75 isnt really big enough for fronts.

agreed...75g is really maxed out with any fronts. Fronts can get crazy big and require swimming room. If you intend on either upgrading or selling them, then maybe consider some small mates. Otherwise, keep in mind how large they can get. Fronts have a great demeanor.

Fronts are great fish, but they should never be kept in a tank any shorter than 5 feet long term. Frontosa can get up to 15 inches if given proper housing and food. They are also colony fish, without a proper colony, they tend to get stressed. Unless you can upgrade to something bigger in the very near future I would either rehome them, or not add anything else to the tank.

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The good thing is that they grow slow and will allow you some time to save up for a larger tank, minimal would be a 5' 120gal for about 5 Front's.. As of now with them being 2" in a 75gal you can add a couple of young groups of Tang's so that when the Front's move out they can stay there and continue to colonialize, 6 Calvus and a group of Julidochromis or Lelupi will look nice..

Definitely be careful though...fronts are predators. Smaller "torpedo shaped" species could end up as snacks. I think Calvus/comps would be the safest route because of their body shape.