No your right pyrofish except for "most cichlids". African ciclids from the rift lakes like extremely hard and alkaline water. Which your right coral, crushed coral, marine sand, shell will be good for a tank with them as it will buffer & help mantain a high ph & hardnesss. But all of the fish listed above don't like that. Central American cichlids like hard & alkaline water but not quite as hard & alkaline as the Africans do especially those from Tanganyika. But then on the other hand South American cichlids and some African ones that aren't from the rift lakes like soft and acidic water.
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