Great thanks for all of your help, i think i will do away with the light and get a heat mat and set that up on a thermostat, i should be able to keep the temp about 80 durring the day and it will drop to 72 at night. i keep my humidity about 60%, that is how i cleen my tank and i change there water everyday with treated tap water. i do have one more question do any of you use spingtails to keep you viv clean or is this just for PDF'S because they can eat them as well. i do have live plants in there and i also clean there tank once a week. when i clean the tank i will knock the poop off of the plants onto the substrate for fertilizer for the plants. but clean it off of the wood and glass. and wipe down the glass with distiled water. i've had them for about 6 mounts and i have only changed the sustate once. How often do you change your sustrate? Thanks agian.