I have an external scoop/strainer fabricated on the hull, but still use the internal strainer, too. Replaced my strainer with a nylon version...
What was the reason for no-bromine? Do you recall? Bromine tabs in a stationary HVAc turned up while away no bueno, but with the chiller the...
As far as a service, local boat yards will have the vendors you need.
No time like the present to add a fuel pump and racor to your manifold and polish your own...
Bromine tablets into your sea strainer basket....
That's crazy.
Barnacle Buster or an HVAC coil cleaner if available.