+1 to what others have said
The fly trap and sarracenia will do poorly if left in the terrarium, but will probably die if suddenly put outside for dormancy. I'd take them out of the terrarium and move them to individual pots, but keep them indoors by a windowsill until the weather warms up, them move them outside. They still have a chance to grow into very nice plants. The terrarium would do well for tropical plants. small Nepenthes, tropical sundews like the one already in there, and mexican pinguicula (butterworts) are easy and would do nicely.
I water with the filtered water they sell in machines outside of markets (the ones where you bring a large bottle and fill it up yourself). It is completely free of minerals.
There are many great care sheets on all CP species all over the internet so those would be a great place for additional info.
hope this helps