Yes it has... thank you!The abdomen does not look shriveled, so that's a good sign. It is also pink, so it's not in pre-molt. It may just not be hungry. All you can really do is keep offering food every couple of weeks and keep the water dish topped off. It has a hide, yes?
You live in the Philippines, the last thing you need is to worry about temperaturesMy room temp is about at 29-30 celcius. Is there any ideal size for the enclosure for my tarantula?
Nah. Genus Pamphobeteus are fine at such temperatures. Keep the substrate on the moist part (moist, not wet). Use a syringe or a plastic pipette, and pour room temperature water in the substrate, directly. If you can, offer him/her an enclosure with more floor space... from that pic, IMO seems little.Do they require cooler temp?