I currently have a breeding colony of around 40 Cardinal Shrimps (Caridina Dennerli). I am thinking of adding a new species. I am wondering which of the following species are the easiest to keep, and compatible with cardinals: Mini blue (Caridina Loehae) , red orchid (
Caridina Glaubrechti)
, white orchid (Caridina sp), or red tiger (Caridina Tigri).

Thanks,
Tim