So got this 5 red belly piranhas that are in a 40g breeder since they’re only 1.5-2”.. I just wanted to know if I can keep them in this tank till the end of the year and will I be able to keep them in a 75g next(current apartment is alittle tight for a bigger tank) or do I absolutely have put them in a 125. im just trying to figure out as early as I can to prepare.