I bought two wood shrimp (about 1 inch each) from my LFS a couple of days ago. So far they are quarantined in my cycled, planted, 6 gallon Eclipse tank. (everything I get from my LFS, including plants, needs to be quarantined for at least 6 weeks... the guy actually tried to sell me a half-dead shrimp this time... I guess it was easier to catch

Anyway, I have a couple of questions about the shrimp.
1. After the quarentine, would it be ok to keep the shrimp with my 3 apple snails (Pomacea bridgesii) in a 30 gallon? The pH of the tank is around 7.8 and I add extra calcium and iodide. Could I keep a few smaller algea eating shrimps in there too?
2. Right now, they don't seem to be fanning at all. The tank is pretty clean (it used to be home to my snails, so I did 25-30% water changes 2-3 times a week). They do walk around and pick up food from the gravel once in a while, but not very often. I feed them with crushed bottem feeder pellets and crushed flakes.
3. One of them swims around a lot while the other one just sits there most of the time. What is the normal activity level for these guys? My water temperature is 78 degrees, ammonia and nitrites are 0, Nitrate is below 10ppm, pH is 7. I use prime as a water conditioner, so hopefully any heavy metals are detoxified.
4. All my tanks are filtered by biowheels. After I'd put the shrimp in the tank, I came to look at them; I could only find one. I then discovered what I thought was a leaf sticking out of the filter. It turned out the shrimp had crawled into the filter, and his tail was sticking out. I kinda freaked, because I was afraid the wheel would hurt him, so I took him out of there. Should I try to block the filter so he doesn't crawl in there again? He seemed very happy in there (certainly didn't want to get out!).
Anything else I need to know about these guys?
Thanks
