Having a coral (saltwater) tank, I wondered, too. Since I didn't know what interactions a marine additive would have on terrestrial micronutes, soils and ferts, I figured I'd better stick with traditional methods. (too broke to be overly-creative, lol)
When I lived in Vegas, the municipal water smelled strongly of chlorine. Filling a 5 gallon bucket with the water, and letting it set uncovered for a day, the chlorine smell disappeared. (isn't chlorine in muni. water supply a gas?)
HTH
Also, adjusting local water to use on plants, both outdoors and houseplants, is common. Shouldn't raise suspicions at all.
Rusty Trichome Reviewed by Rusty Trichome on . Purifying tap water with fish tank drops I have 2 types of fish tank drops: One removes chloride, chloramine, some other choloro something and neutralizes heavy metals. The other drops just remove all the chloride and chloramine. I used a few drops in my tap water to make it safe to water my plants with, as my bottled water supply is running low. The bottle said safe to all aquatic life (which would include plants... so...?) Rating: 5