How do I keep these gnats away?

[angelspower]

I have 4 different enclosures for my isopods and they are in a shoe box size Tupperware. I created the substrate of: cocoa fiber, sphagnum moss, charcoal, worm castings, & orchid barks. Pretty brand new substrate and yet on some of my enclosures these annoying gnats appears out of nowhere. Where did I go wrong?

 

[ANTdrew]

Probably fungus gnats. Reduce waterings to let the substrate dry out a bit. Mix Mosquito Bits into any future water you use to hydrate the setup. Also put yellow sticky traps near it.

 

[angelspower]

Probably fungus gnats. Reduce waterings to let the substrate dry out a bit. Mix Mosquito Bits into any future water you use to hydrate the setup. Also put yellow sticky traps near it.

Thank you. I just ordered the Mosquito Bits.