I have 3 breeding pairs, all in seperate tanks and filtered independently (no shared water)

3 weeks ago I had 2 pair begin spawning within 5 minutes of each other, this I thought to be a coincidence. Tonight the same thing happened. both pairs began spawning at the same time.

I thought that this may have something to do with ai pressure changes as weather changes or maybe moon affects. Or maybe just another coincidence.

I thought it would be to much of a stretch to assume water conditions because they do not have the same water changes on the same days.

Interested to hear everyones thoughts and exeriences.

Cheers

Robin