I plan to have some Tiger shrimps in tank with my other shrimps

other shrimps:
CBS x3
Panda x2 shadow panda x1
CRS x14
Blue velvet x4
Fire red x 5

Waer para:

PH 5.8-6.3
Co2 injection
GH 6
KH 2
Nitrite and nitrae 0
TDS 240
Temp 21-23

I would like to ask if I can put the tigers in for more fun/crossbreed?
I have read seems tiger likes PH >7 is that true? If so how can ppl make Tibees?

Thanks