Subject: How does calcium carbonate affect the respitory rate of goldfish and why?

I know that calcium carbonate reduces the level of oxygen in water.  When 
goldfish are placed in tap water, there is usally too much oxygen in the water 
causing an increased resiration rate.  It is my belief that when calcium 
carbonate is added to the water (or maybe withit's food) the oxygen levels will 
decrease and the goldfish respiration will return to normal.  Am I right?  Are 
there any sources you know to back my up?  I am havoing problems finding this 
info.  Thanks for your help.  I appeciate it! 

Re: How does calcium carbonate affect the respitory rate of goldfish and why?