As long as your tank is stable, worry about RO top offs.
Also, search threads here. We don't go a week without a thread like this so just scroll and scour.
Usually I research the topic before I get something but it was the first time I seen shrimp at the auction besides cherries so I couldn't pass them up. I hate posting threads up like this because as you had stated this has been done a million times. If it wasn't finals weeks I would be researching this none stop but I figured I could make a thread and get a quick answer.
110g Tropical Community & Sakura Shrimp
55g BN Breeding Grounds, Peacock Gudgeons, Panda, Pygmies, & Smudge Spot Cories, Rili Shrimp
10g RCS and show guppies