Third time with this pond. Don't know whats the problem

[Fatmantechno]

Okay so I've just about had it with this pond and finally I am turning to the brilliant minds at mfk. I have a pond roughly 125gal. Filter is a 55 gal drum with lava rocks. Was a mag drive 250gph and now is a 750gph quietone. Fish in this pond will stop eating and eventually grow what I assume looks to me like fungus or ich and die. This third time this is happening I happen to have my brood stock of tilapia BIG MISTAKE. N02 0, ph 6.0-6.7, ammonia 0, hardness 3.5dh. This is the third time it is happening and I've had this pond for a few years now. This is a cell phone picture of my fish. Its got the huge growth on the top of its lip and its got mouth rot and all that on its forehead I believe is fungus. Anyone have any answers, I sure need some quick.

 

[surfpalmsncycads]

first off if the pond was mine i wouldnt use lavarocks. scrubbies, the green scowerpads, and actual filter pads, as for the disease i cant see clearly. i also use aquarium salt in my pond. ive never had a problem.

 

[purplecandle]

Where is your nitrtAte (NO3) reading?

The sounds like Columnaris. Many of the symptoms you describe are symptoms of columnaris.
http://www.monsterfishkeepers.com/forums/showpost.php?p=2138973&postcount=3
http://freshaquarium.about.com/cs/disease/p/columnaris.htm

Common in Tilapia~
http://www.thefishsite.com/articles/238/columnaris-in-tilapia
http://www.americulture.com/Disease.htm

 

[Fatmantechno]

Thanks for the reply. My test kits do not have N03 or I must've used it all. So overnight I have lost 1 fish so far out of the 10. I was reading the links and I seem to see some of those symptoms. The fungus seems to be all on the forhead and eyes/face area only on all of my fish. I am not sure but could it be parasites also? I am not sure if there are worms or just bile excreted by the fish. Also This is a pond. Got any suggestions on what i should do for the pond? Drain it and dry it out?

 

[Lupin]

This isn't true fungus to me. PC was spot on with columnaris. Did you completely eliminate the ich already? I can't see any signs of ich but columnaris to me. Tetracycline is your best bet. It's more effective with your low pH.