Thanks for the quick responses- nothing in the filter. Looks as if the Angels stand condemned. Odd that they did not touch tiny fish that were born in the tank. No more little fish for me!
Newbie posting
I have a mature 4' tank with nothing exotic in it and thought it was a peaceful community tanks until last Friday. I added 10 cardinals, all 1" plus and all seemed well- until the next day. All 10 had gone. I would never have added them without being absolutely sure about the...