Northeast - Bottom paint

I am looking for some advice. I keep my boat in Fall River, MA. It is salt water ( dirty as hell but salt). What bottom paint would be appropriate? There is some sort of ablative paint on the boat now. Is the slime additive really necessary? Do the trim tabs need a different paint?;?

Ablative is the type of paint that avoids build-up. It wears off like a bar of soap wears. I started to use this type of paint two years ago and like it. The other type is the "hard" paint and you cannot put the hard paint over ablative. You would need to have all of the ablative paint removed if you prefer the hard paint. Another advantage of the abalative paint is that before the boat is launched in the spring, the bottom only needs to be touched up rather than a complete paint job.
Yes, if your boat is wet slipped you need bottom paint and yes, there is a slim preventative in some of the paints. I use the west marine brand, with the slim additive. Not sure of the name, but, again, it does what I want it to do. I have a 24' and it takes less than 1/2 gallon of paint.

I'm in Providence, I'm gonna try Hydrocoat this season

Just applied a coat of pettit trinadad hard . I try to get more than one saeson . Metal parts dont like copper so use the drive paint on the tabs .

Ive been using West Marine's cheap black bottom paint for years. Every year I give the boat a good sanding and apply a coat of paint. I keep the boat in a relatively fast moving river, whicih definitly makes a difference.

Micron CSC. Very little build up and keeps the growth off. Building layers of bottom paint on your boat is bad news. Worth the money, you only need to apply every two to three years or longer.

I used to be in the mighty Taunton River... Bottom paint is a must... I always had luck with CPP by West Marine.... it's albative...

Just had my bottom soda blasted - hurt like hell. Anyway, the marina put on a new barrier coat, then a hard bottom paint in one color (green or blue) and then ablative paint in black. When you see the color start to change, it's time to repaint.