Aqua Optima Water Filter Cartridge, Evolve+ 6 Pack (6 Months Supply), Compatible with Brita Maxtra, Maxtra+ & PerfectFit, 5 Stage Filtration System Reduces Chlorine, Limescale and Other Impurities. Elevate your drinks with Aqua Optima Evolve+ water filters for clearer, better-tasting water. Our 5-stage filtration reduces impurities like microplastics and limescale, protecting appliances and saving you money on bottled water.