ive never had this happen before, my 125 i stocked four days ago is kinda worrying me, i had it set up three months before adding fish, cycling with ammonia, then three weeks ago i got 20 zebra danios and 10 giant danios, everything was fine, then four days ago i got a true parrot, severum, acara, and bichir , the zebra danios quickly got eaten, so theres my cichlids, bichir, and 10 giant danios in there and im getting 1ppm of ammonia two days in a row now, i did a big water change and its down to .25ppm but im not sure why, i have three 400GPH canisters on the tank, each filled with eiham substrat pro mostly, i think im gonna pick up a bottle of cycle today just to be safe, but, anyone have any opinions on this, did i just add too many big fish at one time, 4, i dont know, my water parameters are always great, really annoying me, oh, and out of the tap its perfect, no nothing at all, anyway, opinions PLEASE