I am just getting back into fish keeping after about a 3 year break. I got a 120 - 48"x24"x24". When I was keeping fish before I always had fully planted tanks and was really into the dwarf pike cichlids. Well I still want to fully plant this 120 with co2 and all the bells and whistles but, as far as fish go I would like to try something other than dwarf pikes. I really like the Vieja Argentea. But I also really like Texas Cichlids. No matter what fish I choose I really only want to keep a single breeding pair. So.... Is this tank big enough for a pair of either of these fish? Also are these good candidates for a planted tank?