They have beautiful weathered holes and crevices that most fish love to hide in, and make a wonderful addition to any tank. We’ve taken real gorgeous limestone rocks and created a lightweight version, making them much easier to handle while allowing them to be cut for custom applications. To ensure that your Holey Rocks retain their pristine white appearance, regular bleaching or consistent cleaning will help. But as many know, these rocks look equally amazing once they’ve had some time to season in a well-established tank. For many, it’s the natural growth and color variations that make them so beautiful and appealing.