Worldwide Imports AWW84120 Live Nutri Seawater for Aquarium, 2.20-Gallon

Only received one item which is upsetting as reviews have said that you get both. At the price I can go to petco and get 5g of imagitarium pacific ocean water

Less expensive at your local aquarium supplier, provided you do not use a chain store. I have a local expert managing my 125 and 60 and 40 gallon (isolation tank) setup. The benefit is the 2 pieces. These are smaller than others and are easier to lift into a tank. For cost effectiveness, I would recommend a Sea Salt Mix ( Instant Ocean Sea Salt 160 Gallon  where you add tap water (purified of course with Seachem Prime ( Seachem 116043304 Prime 500ml You just saved yourself a bundle of money using these products.