The one and only caveat I've ever heard with the "drip" method I thought was kind of fascinating: Let's say you take home a bag of fish with low hardness (say R/O) water. The residual fish waste in the water weakly acidifies the water. Now you take the bag and start to drip in harder tapwater. Even a small bit of the buffered water will start to raise the pH. As the pH is raised, the nitrogenous waste in the form of ammonium (NH4+) starts getting converted to the deadly ammonia (NH3), possibly at a faster rate than the old water is diluted by the incoming clean water. Yipe! So, I am curious, I have heard this particular bit of theoretical chemistry a few times. Has anyone actually experienced this when bringing a fish home? - Erik -- Erik Olson erik at thekrib dot com ------------------------------------------------------------------------- This is the apistogramma mailing list, apisto@listbox.com. For instructions on how to subscribe or unsubscribe or get help, email apisto-request@listbox.com.