for the cams, he could still make the 100 gallon well ventilated. adding small fans maybe? drilling holes in the glass........or what about tipping it on its side (said the tank was 6 ft long right, make it 6 feet tall) and making some kind of screen drs. just got to make the tank fit the animal you want is all he needs to do.
jessica, if this were a 10 gallon tank then yes i think they would stress them out. but he said this is a 100 gallon tank. he would need it to be really over crowed i think to make it that bad, or cram a ton of them into the tank with little cover. plus if he does live plants, leaf litter, back, tiny hides everywhere, maybe underground tunnels.........and doesnt over crowd i think they will be fine. but thats just my opinion. i know where you are coming from and respect your opinion. personally, if he had the geckos in there i dont think he would ever see them. even at night if he has good cover.