I take that this RES is a female? It's SCL is 3 inches..

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Added on March 27, 2011, 6:46 pm
DSC_0435 by BenSow, on Flickr

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Added on March 27, 2011, 6:47 pm

I had this problem before, the shell keep floating right? Have it under the sun to bask. Do you let them do that? And for 3 months they are still very tiny o.o

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Added on March 27, 2011, 6:53 pm

lol ok but how they find out if you keeping undeclared stuff? o.o

Hi, why not try using those heat bulb? I'm using exo terra brand. Previously using table lamps from ikea. Can feel the heat but after changing to heat glo infrared bulb from exo terra, there's a huge difference. Can feel the air around kinda heated/warm.
I'm no expert but according to my vet, if their body temp increase, their immune system improves & recuperate much faster. Thus, what I've learn to take note are :
1) temp, especially in e night
2) sunlight
3) diet
4) exercise

Hope I did help somehow.
Do bring it to e vet if still unwell. Let it sun more. Else get a UVB bulb.

Cheers & keep us posted.