It's that time across the country......time to open up the swimming pool. Online shoppers are searching for the best deals. There are lots of places to choose from. Some offer free shipping or flat rate shipping. But more times than not, their product prices are higher to basically include the cost of shipping. Some offer very low prices but charge shipping. Bottom line.......look for best total cost. To get the best possible pricing on filters may be to buy more than one. Most shipping calculators figure the price based on your ship to state, ship to zipcode, and the weight of your order, not the number of items in your order. Therefore, adding another product to your order will increase the shipping slightly but make your cost per product lower. That's how we do it at www.allpoolfilters4less.com. You'll save with us if you order more than one!