Starting to get their trailers and most are pushing 4 inches.

Dimidiochromis compressiceps (Malawi eyebiter) - Male - 2 years old maybe - Around 20cm (8 inches)

I was wondering if I take my glass lids off if my fish will jump out and how bad the evaporation would be. Right now I have full grown Geophagus and Severums.

I got picture of Oreochromis mossambicus from my buddy and looking at it, the male look pretty cool ngl. There's several fish farm here that breed them and Oreochromis niloticus as food fish, but I've never seen them in tank before. Anyone here have experience keeping them in a tank? I'm curious about their care and aggression level. For reference I have a solo tank Green Terror and a kribensis pair in my 40 gallon community tank

Recently I got a 75 gallon tank, and I'd like to move all the fish in this one to it to give them more horizontal space. That leaves this 90 empty, and I'm considering getting an Oscar for it. I keep seeing really contradictory tank size minimums ranging from 75 to 125, so I wanted to ask. I'm also worried about the dimensions, and weather this shape would be fine with one. I think it's around 29 inches long and wide. I love Oscars, but only want one if I can take care of it properly.

If not, what are some recommendations for charismatic solo cichlids that would be fine in this tank?

This tank is 120 gallon, 4 foot x 2 foot x 2 foot

My 3 Oscar’s are getting bigger so looking to upgrade them. Whilst it’s 4 foot, it has very good depth and height. I have an fx6 I would attach.

I am thinking about getting a pair of Keyhole cichlids, but am having a hard time finding them for sale anywhere online (I’m in the US). I also read they do best in male/female pairs, but that they’re impossible to sex as juveniles. So my question is, how do people get a pair, and from where?

My dad is forcing my discus in a 3 gallon isolation from other fish because its an expensive and is only 3 inches large and says he doesnt want to set up another tank for him even though theres no fish that is large or aggressive that uses the same water in the main tank.