Getting the green algae stain off my boat?

[Sore Thumbs]

My buddy owns a car lot. He has detail guys that every have kind of wax and buffer possible. They have a mix of compound and wax that works great on cars. I just a feeling that the acid would eventually wear down the gel coat. That acid does miracles on the jack plate. Looks brand new after you spray that on there. Algae just sluffs right off. 

[slowbait]

use windex to get it off the next day. works great

[Longball22]

Mixed opinions on whether it "damages", but putting the Works toilet bowl cleaner on and spraying off quickly works wonders.  Awesome for scale on lower unit and stainless props too.

https://www.thehulltruth.com/boating-forum/618234-hull-cleaner-vs-toilet-bowl-cleaner.html

[eyedabassman]

Bow To Stern! Just goggle it ! Best stuff I have ever used and it is biodegradable!

[Champ188]

7 hours ago, Longball22 said:

Mixed opinions on whether it "damages", but putting the Works toilet bowl cleaner on and spraying off quickly works wonders.  Awesome for scale on lower unit and stainless props too.

https://www.thehulltruth.com/boating-forum/618234-hull-cleaner-vs-toilet-bowl-cleaner.html

X2 ^^^^

[fishinwrench]

You can scrub/buff/polish a stain away and make it look pretty as long as it stays on the trailer, but in my experience the stain always comes right back after a couple of trips out.  I keep the part of the boat that I spend time in neat and clean, but I don't care how discolored or stained the side that the fish see is.

[tjm]

Buffing compound is abrasive, so eventually the clear coat will be worn through. I wonder if that will be noticeable after waxing and buffing the wax? I don't have a boat, so.... but I'd think a solution of detergent, bleach and water applied with a stiff brush would take a bunch of the stuff of and do no damage.  To remove black algae from your roof  you can use  a quarter cup of TSP + a quart of bleach +  a gallon of water in a pump sprayer; soak it, let set 15 minutes and rinse. I have cleaned black algae from lumber using dish detergent and bleach solution the same way. Major Warning: do not use a cleaner that contains Ammonia with Bleach ; they mix up a deadly reaction with fumes  that kill.

 

[176champion]

Run thru some red algae now and you will be good to go for Christmas..lol   Sorry just had to say that. They say purkleen is good also, i have always hull cleaner by attwood and it seems to work.

[Bill Babler]

Guys the best solution by far not even close is simple sno-bowl tolit bowl cleaner. It is cheap as dirt and completely removes all water, calcium and algae stains. If you can find it in the spray it’s better than gel. I would be pretty careful with a magic eraser after you use it re-wax as it is pretty aggressive 

[96 CHAMP]

Vinegar and water every time I pull it out or if weather is inclement as soon as I get it home in the garage. For hard to get rid of water spots pur-Kleen is another option