Well i have a 45 tank with tetras and plants,neons,black neons,columbian tetras are the fish that are dying off.the rest of my fish are community fish.But after coming home.i noticed a fish dead.But the next day i have found another dead fish.This has bee going on everyday.I don't see any illness and my water perimeters are good.The fish don't seem to be sick but the ones that have been dying seem to breath fast.this started after i added some Siamese algae eaters.If any one can help me please write back 
