We only sell the highest quality 45ml EPDM and 6 oz geo-textile underlayment for your installation project. This is the same material we have been using in our professional pond installations for the past 20 years.
Please measure accurately so you do not run yourself short on liner or underlayment.
If you have any problems fiquring exactly what you need you can call or email us. when emailing please provide a rough diagram and the dimensions of your pond and stream you are wanting. We will be glad to help you find the right sizes for your project.
Keep in mind when doing a feature w/o a pond that you double the amount of underlayment you will need.