I think the OP means the carpet type stuff. It is usually recommended not to use that, because it is much easier to spot clean substrate, blueys can burrow in substrate, it is completely clean out substrate and dispose of it etc. etc. The repti-carpet products will not absorb moisture and can be a breeding ground for bacteria etc.
If it is just under his water area it is probably ok, as long as you have a couple and wash and dry them in between uses and switch them out. I just use tiles under the water dish instead of substrate or anything, as they are easiest to clean.
If you are looking to make some changes, have a look at the enclosures picture section and maybe do a search on enclosures. Lots of members have added photos that will give you some good ideas. That reminds me, I've been meaning to add some pics to the enclosures section but I keep forgetting....
Oh yeah - welcome back to the forums!!
