ARGH! The interwebs just ate my long post.
I wouldn't put your shrimp into any of your tanks because they aren't cycled. You will kill them. Are you familiar with the nitrogen cycle? If not, Google it NOW. It is probably the MOST important part of fish and shrimp keeping. If you don't have it already, buy the API Master Kit. It has all the tests you need for right now.
Don't put the shrimp in the tank with the fish. The high ammonia will kill them. Cycling a tank with fish is unnecessary and cruel, but too late now. If you can find it, buy Tetra SafeStart for that tank. It will cycle the tank in days. If you can't find it, you'll need to do large, daily water changes and dose Prime (only Prime, don't use anything else) until the tank cycles, usually about a month.
Put the shrimp into the other tank along with the moss ball and any plants. Put the sponge filter in there and use the airstone to keep the water circulated. Because shrimp have a smaller bioload, it will probably take longer to cycle their tank. Do not use the TSS with the shrimp. Do frequent, small water changes and dose Prime until the tank cycles. Don't feed them anything, just let them graze on the plants and moss ball. Adding food raises the ammonia level if left uneaten and shrimp are messy eaters who make a mess.
If you're picking up the shrimp locally, ask for a baggie full of their substrate. It has the beneficial bacteria you need. Put it in some pantyhose near the filter intake. This will help seed your filter and shorten your cycle. If they're being shipped, I guess you could ask for some substrate, but I'm not sure how long the bacteria live without an ammonia source.
Don't try changing water parameters. RCS are hardy and can adapt to most params if acclimated properly. Read this on how to acclimate properly. http://planetinverts.com/Acclimating...%20Shrimp.html
. In fact, read all over that site, it's my go-to place for research on shrimp and it was really helpful when I first started.