Hi all, newbie on the fourm here. I recently just filled my tank and added my deco. I noticed that one side was severely higher than the other side. I will include some pictures of the level placed on the center of the tank and see if i should worry or not. Sorry about the flickr link had to do that because picture was to big for limit. Also i got a sponge filter from my LFS out of one of their tanks. I recently noticed two small snails roaming around and was wondering if they came from the filter as every other thing in the tank is artificial.
http/www.flickr.com/photos/90517760@N04/8523448258
http/www.flickr.com/photos/90517760@N04/8523448258