Best Pellet Food for Stingrays - Part Deux

Feel free to research the ingredients, etc. on your own. I've picked high- to medium-quality pellet foods from reputable manufacturers. As stated before, my main goal is to provide our rays with a quality, economical pellet food.

Here are the prices listed from most to least expensive.

Hikari Carnivore - 2.2 lb -> $50 = $22.73 per lb
Hikari Massivore - 2.2 lb -> $43 = $19.55 per lb
Hikari Sturgeon - 4.4 lb -> $58 = $13.18 per lb
NLS Mega - 1875g -> $50 = $12.11 per lb
NLS Thera A Jumbo - 2240g -> $55 = $11.16 per lb
Ken's premium earthworm sticks - 5 lb -> $48.50 = $9.70 per lb
HBH Super Soft & Moist Krill (or Spirulina) Large – 5 lb -> $47.75 = $9.55 per lb
Hikari Cichlid Gold - 2.2 lb -> $15 = $6.82 per lb
HBH Super Cichlid Sinkers – 5 lb -> $28.50 = $5.70 per lb
Ken's premium krill pellet 6mm - 5 lb -> $27.00 = $5.40 per lb

NOTE: After speaking to the Affordable Aquatics folks, it sounds like the Hikari Sturgeon medium pellet is going away due to lack of consumer interest. They stated that the packaging was way too expensive and isn't paying out either (why don't they minimize the packaging like the other Hikari bulk foods???). Anyways, he's trying to find 22 lb ultra-bulk prices for medium sized Sturgeon for me. We'll see if it seems economical or if it even pans out...

Work gave me a calculator for a reason!