My mom really likes the Blue Rams (and I just saw the long-finned balloon variety, very cute even I have to admit) but we're not sure if they'd 'fit'. Her tank is a 25 gal with 4 Cardinal tetras, 3 Emperors and 2 Neons, along with 5 cories and a siamensis. Filtration is an AquaClear 20 and an air pump driven corner filter. Substrate is silica sand and colored gravel, some live plants and a few hidey-holes. Her local tap water is PH 7.0, but she's got a piece of Mopani wood in there to lower it some for the Cardinals (can't give exact readings as she doesn't have her own test kit). Would GBRs be able to go in this tank? I'm kind of worried about them harassing the tetras, being Cichlids after all. And on their profile it says they need 20g per pair, Mom's worried they need 20g all to themselves but I'm fairly sure that just means they need 20g period so they have enough room to swim around and escape so the male isn't constantly harassing the female. Which leads me to the next- do they NEED to be kept in pairs? Are they a fish that would get stressed or sick if they don't have another of their species to play with? I ask because she doesn't really have the resources to take care of a swarm of babies; she lives in a tiny house and no matter how much she wants more tanks, a grow-out for Rams is completely out of the question. Thanks in advance for any advice you can give!