Which type of pool surface is most resistant to algae growth?

Fiberglass surfaces are most resistant to algae growth because of their smooth, non-porous finish, which does not provide an ideal environment for algae to adhere and thrive. This type of surface minimizes the number of crevices that can trap dirt and organic matter, which are essential for algae growth.

In contrast, surfaces like concrete can be more porous and may develop rough textures over time, which can create favorable conditions for algae to take hold. Vinyl surfaces, while generally easier to maintain than concrete, can also develop small scratches or imperfections that can harbor algae. Tile surfaces can provide a smooth finish but may have grout lines that collect debris and organic material, where algae can start to form.

Thus, fiberglass stands out in terms of ease of maintenance and resistance to algae due to its material properties and surface characteristics.