i would put them in a 10 gallon tank w/ screen. in the wild it is dark at night and it helps them maintain their day/night cycle. if you havent been turning the light off at night they may just be stressed. a regular light is fine, no need for ful spectrum or anything fancy. at best i would get a small heat dome with a daytime bulb. not a heat bulb. the daytime bulbs are shaped like a regular house bulb, but are blue and give off "full spectrum" but it is not really full spectrum in reptile terms. this bulb would be fine, just turn it off at night. keep the water level in the tank at about 3" deep. pile gravel up to one end so they can get out when they want/need to. in the water end put in a whisper 10i. it is also called a micro filter. and it is also the reptofilter, only the reptofilter is green plastic and has a top over the filter cartridge, but is made by the same company and probably costs a little more, so go with the micro/10i. this filter is great for little animals and only needs about 2" of water to run. i dont have any preferences or any that i wouldnt recommend as long as they are made for tadpoles and not "all aquatic reptiles and amphibians". variety is always good and like i said, they might love live foods like the blackworms. pet shops keep the live blackworms in the fridge so you will probably have to ask for them. room temp is fine. dont give too much sun, small bodies of water can heat up pretty fast and tadpoles will want it cool if anything, unlike most reptiles. i dont know about the air bubbles on their sides, but if both have them in the same spot it might be their stomach or some other internal organ. im not sure if tadpoles have a swimbladder like fish but it could be a modified lung or something. basicly if it doesnt look like a disease(white fuz, red splotches, open sore) dont worry, but it obviously wont hurt to keep an eye it which im sure you would do it anyways. if you have any other questions just post them. i will be more than happy to help.