Can some one tell me what to do with larva

So I have been planning on buying some harlequin flower beetle larva and I was wondering if some one could give me like a schedule on what to do like how often to mist it and if I need to change the substrate.

 
It all depends on what container size you will be keeping them in and how much ventilation there is..

If you notice that more than 50% of the substrate is frass, it is a sign to change the substrate.

Personally, I mist the substrate if the top inch or so looks a bit dry.

 
So I’m thinking of keeping the larva in a dellie cup with. 15 hole each 1 cm each wwith this white fibrous material on the hole to ensure nothing escapes. The deli cup is about six inches tall

 
Spraying once or twice a week should be sufficient. 

I don't know how fast they go through substrate since I never kept them but changing the substrate every 2-3 weeks or so should be good if you are keeping 3 or more larvae in a single container. 

 
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