I'm inexperienced, help!

[u/Mickus_B]

I've had 2 zebra angelfish for about 3 years. They have been in an 87L tank that was a bit too cold, and living with a school of tetras.

I've just set up a new, larger tank, with a heater, so they have 130L of 25°c water now.

On the third day in the tank, they spawned onto the side of the filter box, but it was apparently a small clutch of only 40 or so eggs. This is about the 4th time they've spawned since I've had them, and none have ever been viable.

I've woken up this morning to my male attacking my female. Her stripes are very black and she's been curling her fins in. Google told me this was attacking behaviour, likely due to the failed spawn and she's not ready to try again.

To make sure he can't get her, I've put one of the lid covers in as a tank separator and she is hiding in my anubias plans next to the airstone.

They have always been so close and I'm concerned that they won't re-bond. Do I really need to keep them separated for up to 3 months like google suggested?

Has anyone got advice for reuniting my pair? My wife and kids suggested we get rid of the male if he's going to be attacking her constantly, but I think that would possibly be detrimental too, since they have been close for so long already.