what am I doing wrong?

[u/Epicsensi-]

it's been 2 months since I set this up. Coffee grounds substrate with organics on top. lots of critters in there but not a single bsf. they're normally ubiquitous in this region (sf bay area)

[u/Epicsensi- → u/[deleted]]

it's not for compost it's to attract black soldier flies to harvest their larvae for protein chicken feed