Well at the suggestion of yahsemtough I decided to start this tips thread for Aquatica A5000 owners (although I'm sure owners of other CP5000 housings will benefit also).
As some of you might know I'm having trouble with my dual sync cord setup so until that is fixed I am using a single sync cord and the other strobe as a slave. Well I' noticed that when I have my strobes close for macro, the slave stobe pops twice. The first flash is from the strobe syncing with the camera preflash (which is totally useless) and the second flash is from the other strobe. If the strobe is set to low enough power it is not a problem as it will fire twice. But if the strobe is set to near full power it will not have enough juice left for the second flash. Now you might ask how the slave is "seeing" the internal preflash on a solid aluminum case. It is actually coming through the TTL sensor window. Now the solution. I did a little testing to see what I had to do to keep this from happening. All you have to do is wrap a little bit of black electrical tape around the side of the shaft of this window that protrudes into the housing. this keeps out enough of the preflash to prevent the slave from going off.