Tiffany, as I understand it the potting soil should be very light...well draining. Sound right? For many aroids I use 50% potting soil (no moisture crystals), 25% pine bark coarse and 25% fine. Shredded leaves and some charcoal are what lots of folk recommend as well. Maybe better draining yet for philos? I'll get around to philo and Anthurium eventually, they're so darned amazing, but some strategic redistribution's needs to take place first...Thanks!