Keeping pile cichlids with any Parachromis is usually problematic (not mentioning the obvious water parameters preferences).
They almost always see each other as competitors, and its pretty obvious why....they have similar jaw/mouth types, meaning they compete for the same foods.
,View attachment 1496626View attachment 1496627
They also have similar body types , which exaggerates the reason they will compete, and eventually try to kill each other.
If you want to keep 2 cichlids in the same tank, it is usually best to get 2 drastically different mouth, and body types to lessen the risk of conflict. View attachment 1496628
or with Parachromis something that obviously doesn't compete View attachment 1496629
Its my belief preferred water parameters should always be taken into consideration, if you water your cichlids to color up properly , and stay healthy.
Most pike cichlids prefer low pH 7 and below even as low as pH 5), soft , mineral free water. View attachment 1496633
Whereas Parachromis of all types prefer high pH (7.8 to almost 9) hard water. View attachment 1496634