This a super duper International Micron AP antifouling after about 2 years . Covered with barnacles .
It's suppose to be effective in highly fouling area.
My boat was on Brisbane River .
Would not expect such a buildup of barnacles .
Not impress .

For 2 years in the Brisbane River I think you have done fairly well.

This is about 2 years in the Burnett River.

I have Micron Extra on my boat. In Geelong it was fine. Sailed to Sydney and have the boat in Balmain. I left the boat for about 6 weeks and came back to find the hull completely covered in barnacles. After cleaning off I get some green stuff within days and barnacles start coming back within a week. I antifouled in September last year.

per another recent thread i am keen to give Seahawk Biocop TF a try.

Port Hacking the hard shell grows like crazy

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jbarnes85 said..
I have Micron Extra on my boat. In Geelong it was fine. Sailed to Sydney and have the boat in Balmain. I left the boat for about 6 weeks and came back to find the hull completely covered in barnacles. After cleaning off I get some green stuff within days and barnacles start coming back within a week. I antifouled in September last year.

The growth in Sydney at the moment is crazy. It grows back as quick as you clean it off.

Need to have boat cleaned every 4 to 6 weeks usually

It is ablative so the boat has to move regularly to get best results
don't use ablative if the boat sits

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lydia said..
It is ablative so the boat has to move regularly to get best results
don't use ablative if the boat sits

Brisbane River run for about 3 - 4 knots when tide changes , it's constant water movement . Not still water .

There is the problem