You have of store credit. To use it, simply place your order and you will be able to choose store credit as the payment method when it comes time to pay for your order.
We carry all types of filter packs for a huge variety of system brands. Can't find your brand or need help ordering, give us a call at 1-888-309-2837 and we can find a filter pack that is right for your system. If your not sure what filters you need, send us a picture of your system to email@example.com and we will send a link to the filters you need!