help with GT health

[Turion2112]

I have a green terror in a 50g tank with other cichlids all around the same size 4 to 5 inches all were put in the tank within a few month of each other.

Salvinvi (last one added to tank a month ago)
Texas (added to the tank with the GT 3 months ago)
rainbow (was already in tank for about 5 months)
Tiger Barbs 3
Gouriams 6 (was already in tank 1 year)

the cichlids have been in the tank for 4 months. I have noticed a serious decline in the health of the GT in the past WEEK (when I changed the water and relocated all the decor in the tank)
The GT fins are torn up ( the fins on each side, sorry I don't know the name of the fins) and he can not swim properly to escape the Texas when approached.
I see a noticeable twitching in the fish when I watch him thru the glass for a few min. The GT eats ok and comes to the glass when I approach the tank. I also have noticed a white spot protruding from the anis.(that has been there for awhile) I read that this may be a sign of infection. Also there is a what likes like a split in the fishes scales in front of the gills. I thought at first this may have been from a fight and would heal up but it does not seem to be getting better.

I am new to fish keeping although I have been doing this for 3 years I have not had to deal with diseases with success . I have seen other kinds of fish disease and lost the tank but this I have not seen.

any help would by great.

 

[TwistedPenguin]

My guess is the Texas is beating up the GT. You don't have to screw with meds or MelaFix (wothless stuff IMO anyway) but you'll have to seperate the 2 and keep nitrates as far below 20 ppm fior the GT to heal. The chances of those 2 being able to live together are pretty low. I've had/have several Texas and they're pretty aggressive fish.

 

[Turion2112]

The Texas is female and grew much larger the GT in the months iv had them.Gt is male and is the Balloon GT. I am getting another tank i have set up to move the GT out.
Its a 30 g for now qustion is can the tank be ready to go qiucker if I use the water from the water changes I do on the 50 g tank and use the filter material from the 50 g tank in the 30g tank.

I realy do not want to lose that fish

 

[TwistedPenguin]

The water won't make a difference as it doesn't hold any of the good bacteria. But you bet-the filter media holds tons of it. Split the filter media in 1/2 and put 1/2 in the filter for new tank. Then keep an eye on ammonia & nitrite readings on both tank just in case you have a slight ammonia spike from only have 1/2 the usual amount of media. Good idea and it'll solve your problem.