Ecosmarte in a word is ... snakeoil!
It is your basic copper/silver ionizer system that throws in a lot of pseudoscience with such things as 'nascent oxygen' and 'free radicals' and 'hydroxyl ions' on their previous websites. Interestingly enough, their current website just says "under construction" under the 'science summary" for pools.

As far as their claim of eliminating toxic chemicals...last time I checked copper and silver were both toxic, which is why they kill pathogens, (and also many invertebrates, which is why copper runoff into oceans, ponds,and streams can damage the environment.

While copper and/or silver can kill pathogens the kill times are too slow to properly sanitize water in a pool. This requires a fast acting, residual sanitizer. According to the EPA there are only three of these (count 'em, three). They are Chlorine, Bromine, and Biguanide (Baquacil, SoftSwim, Revacil). IF you have a TRUE chemical sensitivity to halogens (as determined by medical tests) then biguanide based systems will be your only recourse but be aware that they are very expensive, don't work that well, and you will eventually (usually in 2-5 years) succumb to pink slime or white water mold, both of which are cured by...you guessed it...chlorine!

Oh yeah, almost forgot....copper is what makes hair green and also stains pool surfaces!

BTW, what you are smelling in your tap is not chlorine but chloramines. Chlorine is not used to sanitize drinking water, a mixture of chlorine and ammonia is. Chloramines have a strong chlorine smell and do not occur to any great extent in a properly cared for outdoor pool. (But are often noticed in a commercial pool towards the end of the day when there is a heavy bather load and very often in indoor pools.) When they do we get rid of them by shocking the pool. A properly maintained pool does not smell like "chlorine" (actually the smell is chloramine.)