my silver dollars breed every two weeks in my 350 gal but me tinfoil barb follows them and eats the eggs when the drop them lol relly quite funny to watch
as for the breeding itself the male color intensifys and the fight each other to work out who turn i guess then they will swim up beside the female and wrap the bottom fin around her vent then vibrate and relese two to three eggg and they do this aboout 10 15 times