Cleaning Fish Blood from Your Boat

If you’re an avid fisherman, you know some stains are seemingly impossible to remove from your boat. Whether it be tough algae on the hull or blood stains on the deck from your last big catch, it’s important to keep your boat surfaces clean and ready for the season. Today we consider two Presta Marine® products that are great for exactly that.


Ultra Concentrated Boat Wash


Deck Spray All Purpose Cleaner


Indeed, it can be a difficult task to tackle tough fish blood stains on your boat, especially if the blood has since dried. Between the following two cleaners, you can effectively restore and maintain the fiberglass, metal and painted surfaces of your watercraft.

Presta Marine Ultra Concentrated Boat Wash

This ultra-concentrated wash creates thick, rich suds to remove algae, grime, oil, fish blood, salt, and dirt from fiberglass, gelcoat, metal and painted marine surfaces. Its phosphate-free, biodegradable formula cleans without stripping waxes, rinses easily, and leaves behind no residue. 

Tips for best results:

  1. Dilute solution 1:400 to deliver optimal cleaning performance and thick, rich suds
  2. Apply soap to boat surface liberally (using a wash mitt, a sponge or a boat wash brush)
  3. Rinse, thoroughly
  4. Dry with a chamois or a soft, clean towel

Deck Spray All Purpose Cleaner

Designed for flat and non-skid surfaces, this powerful, all-purpose cleaner and degreaser is a great option for your deeper cleaning needs. It is non-caustic and aluminum-safe, while being strong enough to remove heavy dirt, grease stains and streaks from fiberglass, metal and painted surfaces.

Tips for best results:

1. General purpose cleaning: spray product onto soiled surfaces, and let stand for 3-5 minutes before rinsing with clean water

2. Heavy cleaning (heavy accumulations of dirt, grease or oil): wipe or scrub surface with Deck Spray All Purpose Cleaner prior to rinsing with clean water

When it comes to removing fresh or dry fish blood from your boat, either one of these powerful cleaners could be just the solution you need. Rather than allowing pesky stains to damage your boat’s surfaces, it is key to regularly clean and maintain its various surfaces, as needed.


In brief, some cleaners are harder on tough stains, like fish blood, than others. Using the most effective cleaning products can make it a lot less challenging to keep your watercraft in top shape for the season. If you are regularly keeping your boat clean of bilge and blood stains, you will be that much more ready to hit the water next time.

The Presta Marine® water-based and VOC-compliant product line is designed to protect and keep your boat beautiful.