I don't think that you're necessarily doing anything wrong. From all reports, it's summer where you are. The water can be expected to be a bit warmer, [even if it doesn't feel like it!] encouraging all the plant and animal life to do what it does best - grow!
One summer a few years ago I had a drama when I cast off my mooring then put the engine in to forward gear and nothing happened! Much was the frothing and splashing at the blunt end, but there was no consequent froward progress. I had the boat towed to the slip before the ebb had taken us far, and removed all the copious weed and mussels from the prop before antifouling it. Three weeks later, exactly the same thing happened again! I couldn't believe it! Now I use high-speed antifouling [so that it doesn't get washed off] and rub lanolin all over the prop after the antiflouling has dried. I then gently warm the prop with my hot-air gun until the lanolin melts and soaks in to the antifouling paint. This may seem like a belt-and-braces approach, but it has seemed to work so far. [Fingers, eyes and legs crossed!]
Peter.
I think the water is much warmer, in the rivers and creeks of the Thames Estuary, than it used to be. My echosounder likes to tell me the sea temperature - 19C at the moment - and it has recorded 26C on the mooring in early August.
I don't know about you, but whereas we used to think that the branacles grew in May and June, so you scrubbed in July and got the rest of the year more or less free, we now get the Invasion of the Pink Stuff from July until September - this stuff will grow to two inches in a month. Yuk!
I'm beginning to think that its daft to scrub and antifoul as I do at the beginning of May - far better perhaps to scrub off the winter's mud berth detritus and then leave it until early July for another high pressure and a proper anti-foul - seven weeks though, I ask you. Mind you I'm having a bad day Raymarine say there's nothing wrong with the Tridata I sent them (does work on speed anymore), please send in the transducer and they'll check that - no that'll leave a hole in the bottom of the boat! A lift and storage while its investigated will end up costing more than the gear. Anyway with all that weed, I'm not going fast enough to measure it.
I put antifouling on last July, with red chili powder, my hull is still clean and doesnt need scrubbing. That's in the meddy as well, barcelona, which is well known for bad fouling. Seems to work. waterline needs cleraning now in the ballearics, but just a bit green and mucky.
Thanks Mirelle - I've tried that. 'Malc' lent me one but it wouldn't work either so sending off the instrument head was a rather hopeful gesture. What I need is someone with a spare transducer - of course the one I have fitted is the most expensive one!!! My one hope is that I have a nick in the cable somewhere but why it should get one is a little difficult to work out.
Antifouled last July and just took her back out last week and she’s clean as a whistle! We wouldn’t of bothered taking her out but we put the cheapest, crappiest stuff on last year, as that was all that was available! Bloody stuff faded the moment she touched the water so we put the good stuff on that we used on the boats before. Back in Friday! Hopefully is stays “good stuff”
I launched towards the end of march with last years remnants.
Dried out in Looe last w/e to remove ample layer of slime plus a far few small barnacles.
I had intended a scrub mid-June, which I recon would have been about right (the extra couple of weeks left me with a severe case of adolescents elbow after scrubbing).
I'm planning another (easy) scrub in 5-6 weeks, but would be interested in any other observations. Mooring is on the Tamar (mainly salt), very rich in run-off.