Hi! I've been keeping fish for a while, but I'm fairly new to Apistos. I've got a 55 gal community tank with various south America species : several tetra, bolivian rams, some corys and a brittlenose catfish. I bought a pair of agassizii earlier in the year, and there were doing well, until I lost the male due to a mistake on my part. Given that they are generally sold in pairs, I'm wondering if I bought another pair, would adding them in with the existing female be likely to cause any problems?