Well its a standard 40g Breeder 36x18x16 I believe.. it was used for turtles.. and then a lizard.. It does hold water and is in good condition.. their asking $20.00 for the tank and overall it looks good. My main concern is, would it be contaminated due to the lizards waste etc? and also, Im just afraid If I do wash it out with bleach/soap ill have algae problems and also possible ammonia problems down the road. thanks