I've a lot of experience of fresh water, and have kept marine in the past, but I fancy a try at these nano's, any general advice please, suggestions, warnings etc.
Read all the posts you can to get a feel for what it is you're jumping into. Realize the cost can be high even for such a small tank and realize that you will have to put in daily/weekly maintence. Plus alot of advice ingeneral can be applied to nano's so just read read read read read.