My pair of German Blue Rams spawned about 24 hours ago, and have been acting rather strange. I swear that about every 10 seconds, one darts over to the bubble wand, grabs a few bubbles, darts back, replaces the one guarding the nest, and then it goes over and grabs a few bubbles. they have been doing this over and over for a few hours. Any ideas what they are doing or why they are doing it?