Ivanacara Bimaculata is an extremely uncommon fish in the hobby and has been rarely documented. I would strongly recommend you ask the person you are getting these fish from for photos they took. The photo of the fish is from a YouTube video (maybe you know this, just letting you know.) If you are to successfully keep a pair and attempt to breed them, blackwater is recommended with a pH below 6 and a very low TDS. Your aquarium is beautiful, and great for the current occupants, but if they were to spawn all fry would be eaten by the tetras as well as the angels. A 125 is a very large aquarium, but cacatudoies may still harass the newcomers. I recommend adding more sight-blocks as well as a layer of leaf litter.Thanks! I could only find the bare minimum on google, I was looking in case anyone has had the chance to work with them before. Here’s the 125 they’re going into. There are some angels and Cacatuoides but I’ll remove anything that becomes a problem for the newbies. I don’t foresee any issues though. May add some pottery but don’t want to detract from the natural look. I only used 1/4th of my almond leaves, may add twice this amount since there are shrimp in there too. I dont expect the shrimp to last forever
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Hopefully you are able to acquire true Bimaculata as these fish are rarely collected, even if your supplier said they were collecting true bimaculata it's more than possible they collected adoketa instead. These are still a rare fish and require similar parameters.
This quote is from Mike Wise, whom is a dwarf cichlid authority on apistogramma.com.The only recent report about N, (I.) bimaculata that I know about is in Romer's Cichlid Atas 1. Romer reports that Franz Vermeulin collected the species in 1997. Vermeulin told Romer that the water was similar to that of I. adoketa: blackwater, very acidic (<pH 5.5) and extremely soft (almost no hardness of any kind at all). There are no known reports of successful reproduction that I know about.