So your saying these tablets would do nothing? I dont know exactly how it would work, but I think this is an interesting idea. Its coming from a LONG time marine recruiter makes me think theres actually something to it. It would be worth a shot I think.

The product I found is called Aquatabs.

Aquatabs are the worldâ??s most recognised and largest selling brand of water purification tablets
They are effervescent (self-dissolving) tablets, whose US EPA approved active ingredient is NaDCC which is also known as Sodium Dichloroisocyanurate or Troclosene Sodium
Aquatabs offer both fast dissolving effervescent tablets and slow dissolving tablets for disinfection / purification of water.

Im going to do a little more research and at some point this weekend try this. Ill keep you posted. I have a extra at home drug test.