GH booster (Seachem) is shrimp safe. Actually, shrimp don't do as well in plain RO water and need some minerals. GH booster (if following the directions) is SAFE.
YOur plants and shrimp will thank you for it. Target for 2-3* GH if you have soft water fish in your tank. Just follow the directions or half them.
YOu need some minerals in your water...RO water is devoid of these.
Most of the chemicals you mentioned are "shrimp safe" as long as you dose in moderation...EI for example dispelled the belief that higher levels of some minerals/ferts. are toxic to fish/shrimp.
Of course if you co grazy, you can kill everything in your tank...plants and bacteria included...