Well I guess the question of whether my two cardinals were male/female has been answered. One was hanging out at the back of the tank under a rock overhang for the past couple of weeks and yesterday I looked at it and it looked a bit stressed out and it's jaw was at a weird angle....hmmmm...I thought maybe just maybe it is a he and he is holding babies in there. Well left it at that.....this morning when the lights came on I was looking under my tank at my auto topoff......and I usually check my fuge/sump to make sure everything is okay and there were 4 baby cardinals cruising in my fuge.....on looking closer I see another 12 or so in the sump return section......I tried to catch them to put them in the fuge....no luck, for little specks they can move. I left them there and added some frozen cyclopeeze and hope that they can eat that....not sure. I have no illusions that they will make it....everything is against it I guess but I wonder if they would survive a ride up through the return pump to the main tank? I can't imagine the ride down the overflow........oh well if they make it great.....if not...I am sure that those two in the main will be at it again soon........