This tank was bought and set up March 2003, had 4 swordtails and two sunsets, and then 2 male guppies, only one of the original fish survived over 5 months (my male swordtail killed my guppies, and the other male swordtail (gave him and my sunset male to a friend), and lost one female swordtail due to paralization after birthing. Was running for 6 months, and then emptied and cleaned (when I moved), and set up again with new gravel at the end of September 2003 and has been running for just over