Alf,

I tried the trailshot, but wound up returning it because it imparted a plastic, vaguely bleach-like taste to the water. I ran about 6 liters through it, and it only reduced it a little. I didn't try anything else. I think it's the squeeze bulb, not the filter itself. Maybe a thorough washing with soap and water, or lemon juice or something would work. Not everyone experiences this according to the reviews. Otherwise, it worked OK, but I only tried it at home. It could use a longer intake hose, with a float on it, but that's easy enough to do if you decide you need to.