I do the same as Newbreed describes, except I place more stringent conditions to drip acclimatising the new shrimp I introduce.
Test TDS, pH and GH of the original water it came in.
I then drip acclimatise for 10 hours <-- slower rate of change.
Keep an eye on the external bucket or breeder box, ensuring it's not too hot (summer) or too cold (winter).
The bucket with the new shrimp is in a blacked out environment <-- ie. no bright lights
An air stone pumping air is included for my extended acclimatising duration.
At around the 8 hour mark, I will test the water the shrimp is in to ensure that TDS now closely matches the tank water.
pH and GH should be very close by this time when 2-3 times the amount of tank water is now in the bucket with the new shrimp.
If TDS is not close to the tank water at the 8hr mark, I'll increase drip rate for the next 2 hours.
I pay more attention to matching TDS than any other parameter when I drip acclimatise shrimp.
I've adopted this for any new fish I get as well.
I believe the pH shock people talk about when introducing fish to new tanks, is really TDS shock.
The last time I bought a fish from the fish store, the water from the LFS was 7-ish pH. But guess what, the TDS was a ridiculous 400+.
By comparison, my amazonian tank pH was 6.8, with a TDS of 160 - 165.
Guess which parameter would be the "shock"?
It's not a once off occurrence, I'm convinced most LFS don't test TDS in their own tanks.