The following businesses in Larimer County sell fathead minnows:
- Bennett's, 121 Bunyun Ave, 970-532-2213 (Berthoud)
- JAX, 1200 N. College Ave. 221-0544 (Fort Collins)
- Colorado Mosquito Control - call 962-2583 for information (Loveland)
Fathead minnows are a proven method to reduce or eliminate mosquito larvae (i.e., immature mosquitoes) from ornamental ponds, stock ponds, and other semi-permanent to permanent water. Fathead minnows are able to feed in heavy aquatic vegetation and in small pockets where larger goldfish and koi cannot reach. They can withstand up to 80 degree water and will reproduce up to 4 times per year under optimal conditions. It is recommended to place between 250-500 minnows per surface acre of water (This equates to 1-2 minnows per 10 foot by 10 foot area, but adding a few more for a tiny pond does not appear to be detrimental). Fathead minnows can generally survive Front Range winters unless the pond is too shallow and/or freezes completely over. They appear to be compatible with koi and goldfish.