There were some decent care articles here with some good information. However the links were messed up a while back and they have not been corrected.

If you change water every seven to ten days you probably don't need a filter. I don't use one in my ten gallon viv with a gallon of water, and it's never tested bad for ammonia or any other water chemistry concern. Much more peaceful for them with out the buzz off the pump.

I think more water of varying depths is preferred by them over land. Mine spend almost all their time in the water. My viv is at least 60 percent water.

As for lighting..... not too bright, I've heard that it can hurt their eyes, and something that won't add heat to the viv as they actually prefer the cooler temps. A cheapo aquarium fluorescent is good.

I have a screened top to let air flow.

I think they like hiding places both on land and in the shallow part of your water.

Here is a link to what I think is a neat design style......http://www.frogforum.net/showthread.php?t=34637 take a look at the link in post #8.