Does one bug feed it for that long? That's a pretty effective plant. Unfortunately, it doesn't sound like it would be a great way of getting rid of the summer flies that find their way inside all the time. One every few weeks is a slow way to get rid of them.
Btw, I just noticed your profile says you're still in Melbourne.
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Yep, you basically feed them bugs as often as you would fertilise a normal plant.
I should probably update my profile. Thought that I had...
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