I am currently testing a variety of foods from Optimal at my pond which makes me think alot about the variables involved. It's pretty mind boggling.
Thus far, all the experimental food samples have all been approximately 4-5 mm round pellets and have mostly yielded less enthusiasm compared to the control feed (Opt BG pond feed - 4.5 mm by varying lengths). I certainly do not know the ingredient differences, but it seems that size and shape MAY be a big factor. I say this without anything more than limited visual observations, but it would appear that the HSB tend to prefer the larger bits of the BG feed and when it is switched to the experimental feeds of smaller sizes...it takes the HSB a little longer to actively start feeding.
I know JPS mentioned size of pellets already...I'm just throwing in my recent observations regarding the same.
