Air purifying big plants , 1. Monstera Deliciosa, Care : Bright indirect light, water when top soil feels dry, loves humidity., Benefits : Excellent air purifier, increases oxygen, and adds a Explore Monroe Restaurants & Wine Euphorbia tirucalli "Pencil Cactus" 4" Some plants could care less, but with others like spider plants youll struggle with unless you use the correct water. I personally use RO water, which stands for reverse osmosis, but you can also use