My two scalare havespawned for the first time only 4 days after a complete tank tear down which involved netting them and putting them in a spair tank while i replaced everything inside the tanks(substrate, rocks, the works) Guess they were not stressed over the process and like their new digs. Best part is that I didn't get a bunch and wait for them to pair up. I didn't even try to determine gender when I bought the two. Just picked the two nicest looking ones from two seperate tanks just hoping they would get along. Just by observation after a while it looked like they were male and female and in the courting stages....and voila. Pretty cool, is already puffing at me to keep my distance through the glass and is chasing away the cardinals. I wonder if they will hatch since the eggs are laid on a heater....