Enter how many animals you feed and how many prey items each eats: you know how many tubs to buy, how often, and what it costs.
| Case | Prey / week | Prey / month | Cost / month |
|---|---|---|---|
| 1 tarantula, 3 crickets/week, tub of 50 for 5 | 4 | 15 | 1.43 $ |
| 5 mantises, 2 flies/week, tub of 100 for 7 | 11 | 48 | 3.34 $ |
| 30 mantises, 5 flies/week, tub of 500 for 15 | 165 | 715 | 21 $ |
| 1 ant colony, 40 fruit flies/week, tub of 250 for 6 | 44 | 191 | 4.58 $ |
Pure calculation from the numbers you enter. Prices and tub sizes vary by seller.
1 tarantula eating 3 crickets a week, tub of 50 for $5, 10% losses: 3.3 crickets a week (4 rounded up), 15 a month, about $1.43 a month. A tub lasts 15 weeks, far longer than the 3 weeks crickets last: a smaller tub is better.
Pure calculation, no hidden assumption. Weekly needs come from each animal’s CalcBiome calculator.
Often 1–3 a week for an adult, so 5–15 a month: a small tub is enough. The tarantula calculator gives the exact number by species and size.
Usually 2–3 weeks with food, water and hides. Roaches and mealworms last much longer.
Yes when you use a lot each week: a small roach colony costs less and saves frequent trips.
Write to me: I fix the numbers and improve the calculator.