Well I guess I reached my limit. The last photo won't upload.
Nope...you got about 250KB left, chances are the file size is too big, it needs to be resized to less than 100KB. There is also a way to have your upload quota increased, for more info, click the Support Aquarium Advice
On the bottom of any page on the site. You can also add them to your gallery (where you also have 1MB of space and link to them via the IMG tags.