Chlorine oxidizes hydrogen peroxide to oxygen gas (in fact, hydrogen peroxide can be used as a chlorine reducer for that reason) so the advice you got of adding some chlorine to get rid of the white water mold (if that's what you have) wasn't very good. After all the hydrogen peroxide is removed by chlorine, additional chlorine breaks down Baquacil/biguanide/PHMB in a very colorful manner. The problem is that chlorine does not break down DMH very quickly at all (DMH is used in the Baquacil CDX system). If you have used that system, then you either need to do a drain/refill (but as Ben says, that isn't always possible depending on the type of pool you have) or you have to use a more expensive (though faster and less colorful) approach which uses high levels of hydrogen peroxide at high pH by using sodium percarbonate as described in this link. Also, regardless of which approach you use, you'll want to start off with the lowest amount of Baquacil/biguanide/PHMB possible so stop adding it as it will degrade on its own in sunlight over time.