It may seem like a silly question, but it is essential to figure out where the ladder will be used to determine the ideal material for your pontoon steps.
If the plan is to take your pontoon boat on a ride in salt water, then you need to mount steps that deal with corrosion better. With the presence of salt, these water bodies pose a high risk of corrosion.
Thus, it would be best to use stainless steel pontoon ladders as they offer more durability and protection. On the other hand, if you dive into a freshwater body, the marine-grade aluminum ladder is a perfect choice.
It is corrosion-resistant and also comes at a low price. However, if you look for more longevity, opt for galvanized steel step as it is superior to aluminum.