12 Best Houseplants for Improving the Air Quality In Your Home 6. HEARTLEAF PHILODENDRON (Philodendron Oxycardium) Great for removing formaldehyde and other toxins. Do not own if you have kids or pets – plant is toxic if eaten! Pages: Page 1, Page 2, Page 3, Page 4, Page 5, Page 6, Page 7, Page 8, Page 9, Page 10, Page 11, Page 12, Page 13