Heating for Snail House?

[goose]

OK so my new baby tigers are in their new home. Its a huge exo terra which came with a rainforest heat wave heat mat and a kind of polystyrene 'rock effect background'. I haven't put the mat under the tank as it is on carpet and I am using capillary matting - 2 no nos for under tank placement. Instead I followed the instructions and placed it on the inside of the tank on the wall behind the rock background. I have put some cardboard then a layer of bubble wrap and then tin foil on the outside of the back wall behind the mat to reflect the heat back in. I know Tigers like it warm and wet - 25 to 30 degrees but I am having trouble keeping the tank even up to 25 degrees, more like 20 to 22. :-/Thought it might be because the polystyrene background which is quite thick was insulating the heat from the mat from the tank so have tried putting some holes in that and even taking it out altogether but it still hasn't made much difference. I can get the humidity up to about 90% as I have covered the wire mesh on the lid with bubble wrap.

So really any one got any ideas on additional heating for snail tanks? Exo terra do these kind of heat rocks which emit heat but are not supposed to burn but these are designed for reptile basking. Thoughts would be appreciated.

[Moracai]

I keep my heat mat on the inside on the bottom of the tank, with capillary matting on top. This works well for me. I would think that the background is probably insulating your tank and not letting in the heat at all. You could try a very low wattage bulb, with a cover over top of it. You can buy those link lights for bathrooms also, I think it's copigeon who is using one?

[goose]

Thanks Moracai. Have moved the heat mat to under the tank outside. It seems to work better that way certainly - I keep the capillary mat on the bottom of the tank nice and damp and it has really helped the humidity too - I don't have to cover the top mesh now to keep it humid which is good since as this helped ventilate the tank with it covered I was getting excessive amounts of condensation in there. The snails don't seem to mind a warm floor and their burying pots are on the cool side of the tank so no probs there at the mo. Temperature still only about 24 degrees though - think I might have to get some auxiliary heating or put another mat on the tank side in winter since it gets pretty cold in our house sometimes even with the central heating.