Saltwaterfish.com's headline offer is 20% off orders over $249, but the best deal for your basket depends on your total spend. The site also runs free shipping from $129 and a $50 discount on marine life purchases above $249, so comparing these options at checkout will show you exactly which saves the most on your specific order.
Spending under $129: If you're picking up smaller items, sign up to the newsletter to get access to special offers and discounts on the site. This gives you a way to unlock savings before you check out.
Spending $129 to $249: Once you hit $129, free shipping kicks in automatically on any order, which is a solid saving depending on your usual delivery costs. That's the best deal available at this spend level.
Spending $249 or more: This is where things get interesting. You're now eligible for both the 20% off deal and the $50 off offer on marine life purchases. The 20% discount will almost always save you more on a basket this size—for example, 20% off a $300 order saves you $60 compared to $50. Stick with the 20% deal unless your order is almost entirely marine life and the $50 offer would give you a better result.
Buying marine life specifically: If you're loading up on fish and marine creatures, the $50 off orders over $249 offer is available alongside the percentage discount. Run both options through the basket at checkout and take whichever produces the larger saving—the system will only let you use one, so pick the bigger win.
Remember that only one offer applies at checkout, so compare the savings across your cart total and pick the option that puts the most money back in your pocket.