Yes. lfs using Ketapang leaves to make the water slightly acidic and soft to the shrimp. It is not only work for shrimp. But working for lot of fishes. You can find the Herbal leaf selling in nice packing in lfs for $$. It is actually ketapang leaf. But processed.

Nano, you must use the 100% dry leaf. Wash it carefully with pipe water before you introduce it inside yr tank.

Normally i'll put mosses or some hair algae inside the shrimp if it is short distance travel. At least there are some food or place for them to eat/hide.