Help?!?!

[KantGetRite]

So I had a 15g column tank with 4 platys, 5 tetras, 6 Rasboras. I set up a new 55g tank. I was told to put the old filter in the new tank and I could add the fish into the new tank Bc the old filter could handle the bioload. I did this and my 4 Rasboras have passed and two tetras. There is .25 ammonia after a few days, 0 nitrites and trace amounts of nitrates. I thought the pH of the water was the same but now I think it might have had a .2-.4 difference. Could this be why they are dying? How do I fix this? I don't want anymore to die

 

[rbeland]

What type of filter do you have? Hard to believe a filter for a 15g can handle a 55g.

 

[KantGetRite]

I have the quiet flow 20 from the 15g (that was cycled) running alongside the new quiet flow 55/75. I was advised that doing it this way would work but fish are dying and now I'm unhappy.

 

[rbeland]

How long after the filter was put on the 55 did you add the fish? Im no expert but the filter in the new tank would have to run for a while to cycle the new tank. Also, maybe the fish were stressed by the move.

 

[KantGetRite]

Theoretically the other filter is also running. Don't forget all my tests are normal. Ammonia is .25ppm which isn't overly high. So the move is all I can think or the higher pH

 

[rmiller]

Wait! Did you leave the fish in the 15 with no filter?

 

[KantGetRite]

No, I moved them over.

 

[rmiller]

What else is in there with them? If there are other fish in addition to the ones from the 15 gallon that would explain the ammonia.

 

[severum mama]

How long had the 15 column tank been set up?

 

[KantGetRite]

No additional fish and 5-6 weeks