So i've been keeping fish for about 9 months now and my oscars were the first fish i have they were two inches when i got them and now have grown to about 9 inches. They have always stuck together and recently have dug a pit out in the bottom of their tank. They also display behavior like they are going to spawn such as tail slapping and vibrating and they never leave each others side. Is there anyway to stimulate them to spawn? i have already turned the temp up to about 81 degrees about 2 days ago but nothing has happened.

