If your happy with it that is great but if you want to save a little cash look around on social media and find a local mealworm farmer and get it super cheap in comparison. We do 5 lbs for $15 but I know some people do even cheaper. Just find out what they screen to. We screen frass to 1/30th which is super fine like you buy in the stores but if you want extra chitin with more shells you can request it at 1/20th or even ask them to scrap the shell sheds off the top of the bin before they harvest the frass. It is super light and would take tons to make any weight and can be added back to the frass or even ground up like egg shells. I top feed the shells on their own just for the chitin. If you don't find any cheap frass around you we drop our prices to $2 a lb for people to help cover shipping cost which a flat rate box is usually the cheapest at $13 for around 10 lbs depending on location. That ends up being just over $4 or so a lb which will stomp even bulk buys from most places. Just something to think about I run a mealworm group on facebook and am involved in several others if you are on the platform it may help our save a little $$.