Pooch Potty boxes are not meant for indoor use (they can be used indoors but the sod will smell after a day or two and the grass needs sunlight to be usable for a full week).
If you do not have protection from rain over your Pooch Potty box, be sure to cover your box with a tarp before rain is expected. If you let the box get rained on, the sod will get too heavy for you to remove.
Please pick up any feces daily, for the protection of your dog's health.
Pooch Potty does not advise that you expose your dog to urinated on sod for any longer than a week. The Pooch Potty box is a receptable for a disposable piece of sod and there is only a finite amount of space for the urine to be absorbed into that disposable piece of sod. Unlike grass on a lawn where there urine gets absorbed into the ground and the lawn is being watered and mowed on a regular basis.
Pooch Potty is not intended to be a replacement for walking and exercising your dog. It is meant to be a back up potty option for dogs whom don't have access to a backyard.