I have 2 20 gallon high aquariums for sale. I have used these for reptiles and rodents. There are NO cracks but I do not think they will hold water. I am asking $15 each or both for $25. I can also include metal screen lids for $5 extra. These are for pick up only in the Toledo, OH area. I am also going to the Taylor, MI reptile show in June if you want to arrange a meet.