Nolvosan, is that chlorhexadine? Chlorhexadine is awesome stuff, and cheap. For effectiveness, use the acetate over the gluconate. Optimum effecacy is with following the instructions. Higher concentrations of some products are actually less effective.
Just because hydrogen peroxide bubbles doesn't mean it's killing all the pathogens. It merely means that it is reverting to hydrogen and water, the more stable form. To be honest, the bubbling action is more productive than the actual chemical, although the reaction does burst many cellular pathogens.
70% Isopropyl alcohol is much more effective than H202, and evaporates quickly with no residue.
Quatsyl is harsh on caging materials, and I can see truth in the cracked plastic. This is why proper concentrations and rinsing are a must. There is not much better at killing virus' and bacteria than this though.
Again, I think it is more important to remember that using chemicals for routine cleaning is unnessesary and possibly long term counterproductive.
Ian
ps, madison, I know your a good guy but how is H202 homeopathic? It's not like it's just found in nature in large, self cleaning pools.