IMHO survival of FHM is one of those, "It depends." I have LMB, SMB, YP, CC and WE in my pond. I stocked FHM in the spring of 2014 into a suitable habitat for their spawning and cover. I still have a thriving FHM population BUT, I also have tons of additional forage species like BG, PS, GSH and just stocked SFS, BNM and PSC this year.
IME FHM alone are doomed as a food source and will quickly disappear but, if you make a solid effort to diversify your forage base, they can survive and thrive.
IMO, add the pallets but think about what other forage you can introduce to your pond to keep the pressure off the FHM....
FWIW when I added lots of broken slabs of concrete and rip rap to my pond, the FHM made a great come back. IMO the slab concrete and rip rap are two of the very best habitat/structure additions you can make to your pond. Flat surfaces for the FHM and BNM, crevices for the SFS, mini-caves for the crawfish....
Last edited by Bill D.; 06/18/16 10:21 PM.