I just bought a pet turtle and a lagoonhe is trying to get out,but he will not eatWHAT DO I DO

Is he sick?

You need a new habitat. A lagoon is not a suitable habitat and was just a waste of money, sorry it sucks but that's the truth. you need a different tank. Do you have a Red Ear Slider? They like deeper water so they should have deep water, also the general rule of thumb is 10gal per inch of shell. Double that for two, so if one turtle is 5 in then it needs a 50 gal for 2 5 in turtles you need a 100 gallon. If you can't afford a traditional tank, you can use a rubbermaid bin. You will need a good filter, turtles produce alot of waste from their varied diet. If you have a 20g aquarium, buy a filter meant for a 40 gal and so on.

If you use gravel, Please remove the gravel ASAP!! Your turtles can eat this, yes sometimes they pass them in their stools, but then they re-eat them and they can become impacted and will need a herp vet. For herp vets in your are check these links http://www.nytts.org/nytts/helpnet.htm.

http://groups.yahoo.com/group/vets_for_h. In extreme cases they will die. Also do they have a basking spot where they can come out and dry off completly? Do you have a heat lamp and a UVA/UVB light over the the basking area?For your UVA/UVB the higher the output the better but 5% is fine. The lights should be on 12 hours and off for 12 just like day/night. Your water temps should be mid to upper 70's and your basking spot should be 10 degrees higher. If you can't regulate the water temp, you can use a submersible water heater or a heat mat under the tank. You will probably need this once winter comes depending upon where you live. Now onto not eating.