Algae on deck (moved from Chatham to Gillingham)

[dankilb]

I would assume Oxalic acid is a no no too?

I’ve tried to find info on pollution risks of oxalic and could only find references to it occurring naturally in water courses! I’m not suggesting it is harmless, but doesn’t seem to be classed toxic to marine life.

It’s probably not the right thing - or overkill - for green (growth), as opposed to brown (staining), on GRP.

 

[Gsailor]

GRP deck or teak - or something else?

On suitable surfaces, I spray dilute Sodium Hypochlorite - the stuff farmers use for cleaning milking parlours amongst other things, but many other applications too. Spray on (I use a back pack), leave 30 mins and wash off. Loads of other uses too!

That is dilute bleach then (as far as I know).

 

[fifer]

Note that patio magic states:

• Toxic to aquatic life with long lasting effects.

I don't think I'd be comfortable using it unless the boat was ashore

I second this. Its very toxic to marine life

 

[justanothersailboat]

Interesting to hear about mould growth at Gillingham. I'm ashore to do some work quite near there and have had sudden and profuse mould and algae growth I never had before. On my GRP, ropes, deck paint, and even bare metal! Quite a pain. I appreciate it's been quite rainy and I've moved there from a salty mooring, and people at Chatham probably enjoy the omni-cidal benefits of hundreds of years of naval dockyard, but it still seems oddly growth-friendly there.

Possibly not very economically, because I had some on hand anyway, I tackled it with watered down Milton and it came up fine. Not sure if this works on woodwork though.

 

[mrming]

Interesting to hear about mould growth at Gillingham. I'm ashore to do some work quite near there and have had sudden and profuse mould and algae growth I never had before. On my GRP, ropes, deck paint, and even bare metal! Quite a pain. I appreciate it's been quite rainy and I've moved there from a salty mooring, and people at Chatham probably enjoy the omni-cidal benefits of hundreds of years of naval dockyard, but it still seems oddly growth-friendly there.

Possibly not very economically, because I had some on hand anyway, I tackled it with watered down Milton and it came up fine. Not sure if this works on woodwork though.

I’m round the corner in the Swale and we also had a sudden attack of greenness. Think it might be the time of year or something. ?

 

[justanothersailboat]

Are you at Queenborough mrming? I usually am It is definitely even more attack-of-greenness upriver. (great phrase, thank you).