this is just my opinion, i belive its a definate question mark about most products on the market in this regards. unless it contains a mild antiseptic the ingedients that make up products like these have to be able to indigestable, take your simple aloa vera extracts & the like! these maybe be benifical to the outside, but can cause irratation internally! fish with every gasp constantly take in everything u add to the tank! so unless your fish has been bashed from pillar to post via netting or simular, i see reason for this addition! the
LFS did the squirt thing before doing up the bag here too, i think it took on the "piece of mind" factor for the buyer more than anything!
as for the declorinators, the folks are on the money, u shouldn't need it unless your drawing from the tap! & then these add-in product to combat it mearly bond new atoms on to it, it drops like "flock: in your green swimming pool!
lol