Aquasoil is a must for keeping Taiwan bee. In fact Aquasoil is cheaper than Fluval Stratum.
9l Aquasoil $30 (AFA) = 22lb of substrate. Where 8.8lb FSS is $20.
I use Nutrafin ciclid as well and it has been nothing but great consistency on TDS level for the past 3 months.
Choose your substrate according your shrimp's need. Amazonia bring ph down to 6.4, Africana bring ph down to 5.9, Malaya brings ph down to 5.5.
Good luck on your shrimp journey!