NOTHING ELSE MATTERS
GreatGrady Captain
If those thruhull fittings are below waterline, you HAVE to change them to bronze, if not, is up to you, but if it was me and i was there already, i would change them to stainless steel, the plastic ones eventually they will break right where the hose connects to the barb portion of the fitting, the question is when and how serious of situation you are at.