I have to agree with everyone, sounds like a case of overwatering.....I have quite a few houseplants, including 2 philos and I water a lot like you Karen--about once a week.....I've killed many
plants by overwatering when I first started with houseplants. When they looked bad I'd think they needed more water, boy did I ever learn....most common cause of houseplant death is by overwatering......Although watering requirements differ for all
plants....it's just important to really read up on them and figure out the best watering pattern for each individual
plant.
And Karen, I'm fighting with the dreaded fungus gnats right now, never had them before....think they were in a bag of soil I bought.....man, they're bad....I let most of my
plants dry way out and bought river rocks to put in all the pots but they are still everywhere......I filled about 6 plastic cups with lemon joy and water and put them right around the
plants and enjoy emptying them everday and seeing about 10 dead ones in each cup.......But as fast as they are dying they are laying new eggs.......I think it's time for some drastic measures...lol Anytime I have a soda I have to cover the top up because I'm scared one will fly in my drink.......