It is an emergency guys plz help me out .. had 2 pairs of green terror of about 5 inches each with a pair of 9 inches oscar for over 2 months in a 220G tank .. every parameter is within normal limit.. as a normal day i went to office and when i get back to see a dead green terror.. and 2 GT swirling round without balance .. I find the fins torn .. and 1st time i am seeing white poop from the beaten up GT .. now I dono wat to do.. plz help