I don't know what the scent is, but generally that sort of chemical is organic and is also usually volatile which means it should eventually dissipate out of the water (i.e. go from liquid to gas) and it will probably get oxidized by chlorine. I doubt that you will even notice the scent with only one gallon in the entire volume of your pool water, but if you really wanted to ensure you got rid of it, you could shock your pool which would likely accelerate the oxidation. However, I think that's overkill and that the scent will either degrade or dissipate over time.

Considering all of the other junk that gets into your pool, including bugs, leaves, sweat, hair, dead skin, spit, urine, and (hopefully not) fecal matter, I would think that a little scent might be a nice change.

Seriously, the only problem I could imagine from a foreign chemical such as scent is that some chemicals might interfere with chlorine's disinfection capability, but as far as I know, only CYA does that . Well, I suppose dumping Sodium Thiosulfate (the chemical that elminates chlorine in your TA test) into your pool wouldn't be great idea.

Richard