I have been mixing my Optimal LM with my BG at about a 15-20% rate. It has worked well, as I'm hand feeding still I'm always there to see the reaction. I'm feeding pretty much all BG and RES right now. I stocked 25 LMB with them back in July but have yet to see any, which doesn't mean they are not there. All the feed is eaten. Sometimes the LMB feed gets hit then pops back up, but very rarely anymore. Mine is 100% float as much as I can tell, was bought in July, and is in a white bag. My daughters have been fishing during feeding time with a small hook and worms/bobbers so I can see the size difference. You can EASILY tell the difference in the ones that are feeding and the ones that are not. We caught a few that looked just about like they did when put in, then some bigger, one that stretched from one end of my palm to the other and had a very nice fat belly, and great color. Will get pics next time we do that.