It's not rot because the circles are made up of tiny dots and they stick out. i thought maybe eggs but then which fish lay eggs on the underside of a plant.. and i didn't think they laid in little grups like that, I thought they scattered them.
How old are what? The plants or the fish? The plant is on bogwood and i've had it for about 3 months but it was in the LFS tank before that. The fish I have had most for around 2 months.