03-12-2009, 06:26 PM
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You'll commonly see swordtails listed as "community fish" although they are a semi-decent community fish, the males (especially the older ones) can get pretty mean to their species/other fish in your tank. I recently bought some swordtails, (1 male, 1 female - 3 in a bag) and the male started attacking my females. I was a little bit surprised and kind of quickened their water adaptment period from 1 hr. to 40 minutes or so. If you have more than one male...you'll probably see a little bit of fighting from time to time. Like Aunt Kymmie suggested, just allow some food on one side, and more on the other.
I agree, they may just be new to the whole brine shrimp thing, most fish love it.
Your filter cartridge being brown is fine, if you want it to be less brown next time, clean it more often.
The only thing I could think of after a 10% water change is the water that was put in was hotter/colder than the water in the tank by about 10F. This can happen, and shouldn't be a big deal until you get to 25-50% water changes but they may hide from the effects. Just leave the lights off for 1-2 hours after a water change, that will let the water temperature adjust, and the lights being off will allow them to settle in.
Best of Luck, Sj
Last edited by Sj45; 03-12-2009 at 06:29 PM..