I could see the change in space causing it.
Maybe they just need more time to get comfortable again. How long were they in the other tank before spawning?
The picture, the eggs look white, was the last spawn fertile?
Did you witness the spawn? Was the male fertilizing the spawn?
Could have an unfertile male. Or the female may have just laid eggs and the male never participated.
If/when they start spawning regularly again if fungus is an issue I found adding half a dose of salt to the tank to be very helpful. For some reason my one female gt’s fry never survive unless I salt the tank.
Maybe it’s the foot print of the tank. The 125 was 6’, yes? The female might feel too over powered by the male in a smaller space.
What size are they?
Can you show pictures of the male?
I love stals and hope one day to have a pair![]()
