Just to give you an idea of the discrepancy in pH between my Flourite tank vs my Eco-complete tank. The flourite tank sits at a nice, stable pH of 6.6. The eco-complete tank sits at a pH of 7.8-8.0.
I suppose for some the higher pH might be better...?african cichlids like this I think. But my fauna is mostly amazon or southeast asian fish. And for sure almost all freshwater shrimps (which I have boatloads in the flourite tank) like it at a pH of < 7.
Pearling.....it's way overrated.