600 gallon compatibility

[Canoeman]

Hi I am wondering if and what type of datnoid,I can add to my tank,some fish of concern that I have are a 2' aligator gar,20 " silver arowana , 16" Jardini ,20"clown knife.i do have a couple true red terrors,and couple sverums , and a flowerhorn also but I don't see them as a problem,ph is 6.3 water temp 84,plenty o f drift

 

[Bertie]

The dat would not get on well with the flower horn or red terrors, they are predator fish not cichlids, it would be picked on, the only way it would work is if the datnoid was 16+ inches so he could hold his own