swordless swordtail..

[Justin83]

Was looking in my tank tonight a realized that my swordtail no longer has it's tail... He is in a 20 gal high with quite a few RCS and a bunch of snails.. 2 long fin Danios, and a platy.. Are the Danios fin nippers ? I thought they where peaceful fish.. I ha,be plenty of hiding spots.. But IM not sure what's going on , if this is fin rot or sometimes not being Nice in the tank..I've also noticed that he still has a good appetite .but he's not very active and his tail droops can anyone tell me what is going on.. Stats are 8.0 Ph , 0 ammonia 0 nitrites , over 80 nitrates... I have a neimatoad problem I have to do a water change.. Thanks for any help

 

[absolutangel04]

Well, just about any fish can be a bit nippy if its not in a full school. However, judging from the pictures, your swordtail had something else wrong with it.
Do you have a testkit for water parameters? How long has it been set-up? Any new additions?
It looks like the fish could have an internal parasite or other issue. He looks pretty skinny.

 

[Justin83]

Nitrates are a little high.. But 0..0.. <80 ..API Master freshwater.. Tank has been up for over a year.. 20G high.. I've had him since the beginning.. He has slimmed down some I guess.. But I feed small amounts twice a day.. Before I go to work and after I get home like clock work.. No new additions the same 4 fish for about 6 months.. All was well till I seen this..not sure what to make of it

 

[absolutangel04]

Yeah, I do suggest trying to get the nitrates down and seeing if that helps at all. He does look skinny to me.
Is his spine bent at all?
See if this thread http://www.aquariumadvice.com/forums/f17/need-second-opinion-on-disease-184987.html sounds anything like what is going on.