Ecosystem aquarium?

[Raechal]

http/cgi.ebay.com/ws/eBayISAPI.dll?ViewI...4366848100&rd=1

If it is completely sealed, how do you change the water when the ammonia builds up?

What do you think about this tank?

 

[Dorkhedeos]

there was one that i think was acually true. called an ecosphere http/exoticgardens.zoovy.com/category/pftecosphere