Looking for advice- I'm doing a bottom job in 6 weeks. Last year I used Propspeed on my Autoprop and 6 months later there was no evidence of it.....the barnacles however were flourishing. While I enjoy diving I like it better without a scraper in my hand.  Given the cost of Propspeed, 6 months is unacceptable. Would love to know if there's something better out there.

Tom and Kirstin
SV L'ORIENT
SM 2K 422
Bocas del Toro Panama