Try Frizz-ease or Split Ends by BC Bonicure to control frizz after or before your blow dry. For added protection apply a blow dry sealer before you start to blow dry your hair. It will protect your blonde hair from heat and this is for high damage control. There are also newer sprays and conditioners specifically formulated with SUV protectants helping your hair from damage. For a great feel try Back to Basics - Kiwi Melon Body Boosting Conditioner.
If your hair starts to go a green from being in the water a little too much, Resolve by JOICO is highly recommended. It will strip the chlorine buildup letting your hair breathe. Eventually you'll get back to your great color.
Sheer Blonde is available at most drug stores. It's formulated to enhance your blonde while protecting it from further damage.
Frederic Fekkai Baby Blonde Conditioner is a daily conditioner and enhances your hair with a great shine. Using sunflower seed oil, lemon peel and other natural products it helps with your hair's elasticity and this product is used specifically for color treated blonde hair.
For further protection, use a wide toothed comb or pick while your hair is wet. If you need a great detangler, BC Bonicure’s Spray Moisturizer is the best product on the market for detangling those hard annoying tangles.
Blonde will always have high maintenance and expensive to maintain. The tips above are to help you in between visits to your stylist. It’s still more fun to be blonde at any cost!