Effect: This Hull Cleaner is a very effective means of helping to remove algae growth. Nevertheless, it has to be scrubbed! However, it cannot cope with stubborn growth, so a bit of fine steel wool will help.
The content was just enough for my 6m trailer boat after 3 months on the Mosel.
Equipment: The Hullcleaner should be applied with a sponge or spray head. The sponge is not recommended because it is very absorbent and because the cleaner is very caustic to the skin. A spray head is not included (hence a star deduction), but almost any conventional one fits.
CONCLUSION: Recommended