You can do a pair of any of the following - Rainbow cichlids, Cryptoheros Sajica, C. myrnae, C. septemfasciatum, C. spilurus, Laetacara curviceps, L. araguaiae, L. dorsiger, L. flavilabris, any species of Apistogramma, either species of Ram or any of the dwarf pike cichlids.
I think Discus Origins might have had C. notophthalmus for sale in the past.
Any juveniles of the species I mentioned could start out in a twenty long, but It's probably best to move the Cryptoheros to at least a thirty as they become adults. Fully grown Cryptoheros are larger and a bit more aggressive than either Laetacara or apistos. I recently moved a pair of Cryptoheros myrnae to a 30 long from a twenty they had outgrown.
Yes you can get a small group and grow them out in the twenty and as pairs form remove the rest. If your new to Apistos your better off starting with any of the species that are captive bred, like A. borellii, A. cacatuoides, or A. Agassizii. I haven't kept Apistos in many years, so I'm not really up to date on species availability, but you can probably find these for sale on Aquabid.com. Also, you can get a lot of useful information at Apistogramma.com.
Just a word of advice, don't plan anything too long term if you plan on going to college soon. Luckily I have my brother who will take care of my tank when I go, but unless you do, I'd plan on something less long term than Jags or Cichla or things like that. They can live for over a decade! I'd stick to things with shorter life spans, like the rams or smaller cichlids. But consider those things because right now I may have to tear down at least one aquarium and sell the fish just because I wont be home. Its sad, but If I cant take care of it, then they're better off in a good home, right? However, if you're 100% sure someone will take care of your fish, and you have the means to house them i'd say get what you want. I'm personally a huge fan of the GBR and some apisto species, if you want my $.02
Well luckily I'm still a sophomore in highschool and my dad is just as big into fish as I am, I just do all the work right now lol I've done numerous big fish but i want to take it down to the smaller things now and try my hand in breeding
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