my first adventure into the new world

[RLBeausoleil]

Last night I adopted a green severum, an orange severum, and a jack dempsey x texas cichlid. I got them from a friend of a friend. He and his wife are having a baby and he wanted to find a good home for them. He was very upset to give them up and I really want to make sure I'm doing everything right.
I have had many different aquarium setups. I've kept seahorses and I have had reefs. I've breed betta fish. I currently have well over 300 total gallons of mbuna cichlids. I'm not new to the hobby, but I know all fish are unique and have their own needs. This is my first time keeping new world cichlids. I have been reading up on them, but I know the best information doesn't come from books it comes from the experience of others.
Does anyone have any tips or advice?

[HUKIT]

Welccome to AA,

Since your familiar with fishkeeping the only couple pieces of advice I could offer are house them in a large as tank possible due to their aggressive behavior and feed a high quality diet and keep the water nitrates below 20ppm since they are prone to certain diseases such as head and lateral line errosion(HLLE) and Hexamita.

[RLBeausoleil]

Thank you

They came with a 75 gallon. They seem happy. I don't see any aggression, if anything they are lazy. I could put them in an empty 90 gallon thats just hanging out in my basement if I start to see problems.

I noticed that the scales at the base of the the one severum's tail are a little messed up looking. I'm not sure what if I should be concerned. I attached a picture. I hope it worked

[HUKIT]

I wouldn't be to concerned at this time, it's hard to tell if it's a scar from a attack or something else like fin rot. Just keep the water conditions clean and monitor it from there.