oscar fish not swimming

Question
I have three oscars(tiger,red,albino) in my 15 gallon tank i just bought two(red and albino) a week ago and the tiger is about 2 months old. when we firstbought the fish we added them to the tank properly and added all the things we were supposed to do the tankis clean and the filter was just changed,and 25% of the water exchanged, now the older tiger and the red are not swimming around in the tank , is this a tank problem or is this a swim bladder prob. the albino is still swimming but into the glass and plants. I dont know what to do and dont want my fish to die please help me. The fish were fine this morning and nothing else was added to tank since this point.  

Answer
Hi Amanda,
 Are you aware that an adult oscar is 16 inches long and can reach that size in a little over a year?   A 15 gallon tank is way too small for even one oscar, let alone three.  I wouldn't keep three oscars in anything less than about 70 gallons and even that might be too crowded.

 As for the immediate problem, all I can suggest is doing some more partial water changes (another 25%).  

-- Ron
  rcoleman@cichlidresearch.com
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