Yesterday my neon tetras starting showing spawning behavior, for about an hour they chased each other like crazy, they would spiral and dance around each other and the males would drive the females into the moss and roots of the floating water sprite and rub all over them.
Today the females look slimmer although I didn't actually see any eggs drop. I have read the eggs are sensitive and most likely won't be viable and I'm not really interested in trying to breed them so I haven't removed the adults but the whole ritual was fascinating!
They are doing it again today. Not as much... yesterday it was all of them, today it just seems to be the largest male and 2 females. I did however see both females drop eggs.
I have turned off the light just incase a few are viable and manage to keep hidden in the moss. I'm pretty excited even if I don't get fry.
The water in my area is very soft at 2.2dgh but the tap water pH has risen from 6.5 to just above 7 in the last week, so I don't know if the gh was affected. To be honest spawning was the last thing I expected with the pH rise.