Im not exactly sure how crickets can survive on tap water and potatoes for the whole month bt i wouldnt risk feeding them off after eating that. Crickets are very low in nutritional value so literally whatever you put in them will go straight into your frog ( or whoever you are feeding), so being cheap wont do anything here. I personally dont like commercial made food, expensive and im never sure what is it in there, so carrots, lettuce, oranges, other fruits - that is how mine are eating. Water crystals expanded with declor water for a drink.