I'd like to set up whole-boat water filtration so I can drink the water from the tap on my boat from either the galley or the head. My boat has FRP water tanks molded into the bilge, so they date from 1979. If you recall my thread about trying to open the tank inspection port, that didn't go so well. I did eventually get a camera inside and learned that a) it's really dirty, and b) even if I got the port open, it would be impossible to fully clean due to the placement of the baffles. So I'm on to filtration.
I need a filter setup that will get rid of bacteria/algae/mold and also anything that might be leeching out of the FRP of the tank itself. I have read a bunch of threads here on SN, and I really like this one
in which Maine Sail talks about a simple and cheap filtration system, but I worry that it isn't enough for my circumstances. Do you think I need something more? Perhaps something down to 0.2 microns? This 3M system
is more money than I want to spend, but I think it will do the job and only need replacement once a year. Should I perhaps do both in series? I read in another thread
that I should do series filters of 5 microns, 0.5 micron and 0.2 microns. Maybe instead I should get a 5 micron filter and then that 3M filter? I'm just looking for the cheapest alternative. I don't want to have to have a Brita on the faucet like in Maine Sail's thread.
Can you guys guide me on which of these possibilities is the most cost effective and will accomplish my goals? Perhaps there is another possibility I have overlooked? Thanks!