Teak decking - new - treat it or do nothing?

[DJE]

I bought some Iron Sulphate that I have used at home on some moss on my driveway.

Thread drift but beware of using sulphates on concrete.

 

[Momac]

Thread drift but beware of using sulphates on concrete.

Good thought but sprayed on once a year (or less) I don't think would be the same issue a sulphate attack on concrete constantly in contact with sulphate bearing ground or ground water . My mossy driveway is tarmac so not an issue . Also the lawn has some moss in it so have applied the Iron sulphate to that.

Unless someone has used Iron Sulphate I think I will stick with the patio magic or similar on the boat.

A product called 'wet and forget' is reported to be effective on green algae on the boat canvas/teak/GRP but it is not cheap.