I've used the shipwreck from 60095 set, 60091 set and the landscape module from 60092 set to create a LEGO based aquarium landscape. It took me around two months to create the optimal equilibrium between substratum, background, plants and fish population. Now everything is ok and the Neon Tetra group members found their night shelter under the shipwreck's cabin.
LEGO Aquarium_5 by Severus A, on Flickr
LEGO Aquarium_4 by Severus A, on Flickr
LEGO Aquarium _2 by Severus A, on Flickr
LEGO Aquarium_1 by Severus A, on Flickr