I recently purchased the double drop raceway water made by bonsai from Groupon. It was delivered late and had a lot of mold all over it. It did appear in new condition so I assume it way simply left in the rain and water seeped in one of the many holes that were in the box. I contacted Groupon about this and they offer to send me a new one in about a month. I will never buy anything from Groupon again.