08-30-2009, 12:35 AM
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British offers sound advice. You must first, determine what your tapwater or water you plan to use , is made up of. By that I mean you need to determine what the pH and alkalinity are.A pH value of 7.0 to 7.6 would be suitable for most tropical fish with the exception of those fish that prefer soft acidic waters such as Cardinal tetras,Discus,and some dwarf cichlids along with many others. If you begin to research the fish that interest you ,you will often find that preferred water chemistry for these fish is listed ,along with information on proper foods,behaivors,compatibility with other fish,etc. It is always easier to keep fish that do well in the water that you have readily available ,than it is to attempt to adjust your water in an attempt to suit the fish. Choosing healthy fish and acclimation of fish to your tank will reduce the mortality rate. Hope some of this helps.