Most indoor plants do NOT release oxygen at night. They usually consume oxygen and release carbon dioxide in the dark just like humans. So you don't need to worry about Amazon.com : COMSUN 10 Pack Artificial Aquarium Plants, Small Size 4 to 4.5 inch Approximate Height Fish Tank Decorations Home Dcor Plastic : Pet Supplies Two 143 metre tall towers set for implosion at German nuclear plant How Much Weed Can You Get From One Plant Reefertilizer Outsunny Wooden Potting Bench with Storage, Sink, Water Tap for Backyard, Patio, Balcony, Natural