The best replacement for aquarium is terrarium.

The best alternatives to aquarium are rated as following:
★★★★★  terrarium
★★★★  fish tank
★★  fritz
★★  chessbase
★★  freshwater aquarium
★★  zoo
★  saltwater aquarium
★  glass aquarium
★  acrylic
★  fish bowl
★  freshwater
★  chess assistant
★  tank
★  oceanarium
★  glass
★  aquarium
  aquariums
  salt water
  georgia aquarium
  aquarium of the pacific
  new england aquarium
  atlanta aquarium
  dallas world aquarium
  camden aquarium
  dallas aquarium
  acrylic aquarium
  sea life
  chess king
  long beach aquarium
  saltwater
  bowl
  fishville
  baltimore aquarium
  aquaria
  new york city aquarium
  tennessee aquarium
  manly oceanworld
  field museum

Your alternative for aquarium is not listed? Suggest!
Speaking about aquarium, one probably shouldn't forget about gravel.

Other search terms related to aquarium and their ratings are:
★★★★★ gravel
★★ fake fish
plastic fish
You have in mind a companion for aquarium and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of aquarium in all years. Click on graph for more.
aquarium
terrarium
fish tank