Fish tank water change on a 108 gal. aquarium. 1. fill bucket tupperware tub with tap water - add tap water conditioner to remove chlorine and detoxify heavy metals. 2. Let water sit for two days. This does two things - brings water temperature up to room temperature and it will make sure all chlorine is gone. 3. Make sure new water is the same PH and temperature as the fish tank water. ( these three steps will reduce stress on the fish) 4. Unplug your fish tank water heater before you begin draining water out of your fish tank.... Jan 30 2011nbsp018332Fish tank water change on a 108 gal aquarium 1 fill bucket tupperware tub with tap water - add tap water conditioner to The very best food you can give your tank critters is exactly what they ate in the wild The Food Groups of Marine Fishes Table shows you what they ate in the wild Many people enjoy the beauty and calming effect of a home aquarium but the work involved with the care and maintenance may prevent some fish tank water change aquarium fish care Part 1 Fish tank water change on a 108 gal aquarium 1 fill bucket tupperware tub with tap water - add tap water Jul 29 2009nbsp018332How To Clean A Fish Tank or Aquarium Remove