GH booster would work, the problem with most GH boosters is that they also contain potassium. So while raising GH, you also raise K. This leads to higher TDS at any given GH.
I mineralize my RO to 5GH, that's around 87ish TDS. If I used Equilibrium or boosters, my TDS would be near 200.
Since using just Ca/Mg, plus all my fertilizers, my tank sits at 145 TDS. My shrimp tank sits at about 180 because I add potassium carbonate to about 2dKH.
When I was able to drop the TDS, my shrimp population exploded. I easily hit in the hundreds.