posted 9 years ago
That link is an amazing idea! I'd though of putting reptile-style pad heaters in, but not water-driven heating (essentially a fish tank heater, pump and tubing). I have all the stuff in my 'fish tank spares' box that I could set that up without having to buy anything too, so I may experiment with it.
As for electricity costs, on its own this isn't incredibly useful but:
- 55g of mealworms costs £4.00
I have here a 22w reptile heating pad, which would cost me 9.5p per day to run. So as long as I produced 55g of mealworms more than every 42 days I'd be in credit (and I'd be getting free frass).
Now would a 22W heater keep them warm enough? Probably not, it is currently in use in my greenhouse on a thermostat to keep the chill off my citrus plants, it can only raise the ambient temperature by about 4 degrees C in a bubble-wrap box, you could probably double that with more insulation of the box but it is unlikely to keep a whole mealworm tower warm enough (my avergae temperature in winter inside the shed is about 5C, in the house 15C).
The velacreations link reckons you can harvest 500g of mealworms a week, which is £36 worth. For my £36 I could run a hell of a lot of heating pads!
What I'm getting at is.. yes it is probably worth giving this a go. With minimal setup cost (I already have old plastic mushroom trays i can use, and both water and air heaters and polystyrene insulation sheets, etc) I can experiment to see if it it is worthwhile.