Bristlenose overpopulation (Hawk Run)

My bristlenose plecostomus don't know how to not make babies.
I have them in every tank.
Some are mottled, some are speckled, some are albino, some look brown.
Most of them are adults or sub adults.
They max at around 4".
Unlike common plecostomus, this dwarf species does not stop cleaning your tank.
They definitely pay their keep.
Their mustaches are gnarly.
2 for 5$? Willing to trade or something I am an aquahobbyist.
At Petco they are around $8 each for fry.
Mine are healthy and already sexed.
I just have way too many.