How to care for houseplants.?

It is like a running joke in my family that i cant keep houseplants alive, even the ones that people say are "indestructible." they either die, or getting totally eaten by some sort of bugs i cant see. i generally water about once a week unless the soil feels moist. i keep them in sunny spots in the... show more It is like a running joke in my family that i cant keep houseplants alive, even the ones that people say are "indestructible."
they either die, or getting totally eaten by some sort of bugs i cant see.
i generally water about once a week unless the soil feels moist. i keep them in sunny spots in the house....idk what else to do!
I just use the same big bag of potting soil to plant them all in...
am i supposed to be using specific soil for each plant? or for the size of the pot?
any tips???
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