yellow labs, electric blue alhi,..

Brief：
These are the cichlids that I will house together when I get my 75gal..One male of each species and about 5females.I got my tank set up in mind. many .. 

These are the cichlids that I will house together when I get my 75gal..

One male of each species and about 5females.

I got my tank set up in mind. many caves and rocks.

My substrate: crushed coral for high buffering capacity

Any recommendations.. think this is a good selection of fish?

I think your selection of fish is a good one. 18 fish in a 75 should not cause you any problems. Five females per male should keep the males colored up nice. I have 25 fish in a 55 and have no agression problems.

If any of them suffer, it will be the yelow labidichromis, they are the least agressive of the group you mention.

I don't know if you need the crushed coral, doing the required 30% weekly water changes should keep your pH where it should be if your tap water is over 7.2. Mine is 7.4 and I use no buffers of any kind. The water changes keep it where it should be.

The fish seem happy, I am constantly stripping holding females. So it would seem they are breeding like convicts.lol.

Good luck with your setup. Hope you get fry soon. that sounds really good. And I would keep the coral as it wouldn't hurt. different people who live in different places have different water coming out of the faucet! Of course.

However, There's a GREATEST website devoted entirely on Cichlids only and it is wealth in information, articles, mixing up fishes together or cannot be together because you cannot mix African Cichlids (the ones you want is called Mbuna) with Lake Victoria or lake Tangainka or Peac*cks or Haps.