Maroon Clown Fin Damage

[Jandrix]

Hello,

My maroon clown seems to have damage to its dorsal fin that appeared suddenly about two days after I added a second fish, a coral beauty to the tank, these are the only two fish in the tank, specs are below:

35G Hex FOWLR
50 lbs live rock
shallow sand bed (<1")
3 years old
HOB-1 Skimmer
650 gph powerhead
Inhabitants: 3" female maroon clown, 2" coral beauty, trochus snail

Ammonia: 0 ppm
Nitrite: 0 ppm
Nitrate: 20 ppm
pH: 8.2
temp: 78F
salinity: 1.025

I've linked a video I took tonight that shows the damage to the fin relatively well. My question is if this is fin rot, or simply nipping from the newly introduced coral beauty? The clown does seem less aggressive now and almost looks as if it is acting passively to the new fish, I think they may have had a confrontation that seems to be sorted out now but I just want to be sure that I shouldn't be treating for fin rot.

Another issue to note, I noticed the coral beauty with an attached stringy poop on two occasions in the past week, the string falls off after a few minutes by the look of it, I believe this indicates worms, although it doesn't seem severe, if it continues I'm going to try Prazi-Pro for treatment.

Please let me know your thoughts on both these issues, thanks!

Video: https://youtu.be/d-uIvLK2No0

 

[Jandrix]

Well, it's been two days and the fin rot seems to be progressing slowly on my clown and I believe I can see a bit on the Coral Beauty now too. The clown has black edges on its fins and fraying of its tail fin, please see the picture below.

I'd like to get a confirmation of my diagnosis before I begin treatment. I bought Furan-2 and am planning on treating the clown in a 5-gallon bucket for four days with lots of aeration as I don't have a QT available. Please let me know if this is or is not fin rot!

 

[Jandrix]

That link didn't work, here is the direct link.

http://i63.*******.com/15nrfyt.jpg

 

[Jandrix]

I guess I'll try a different hosting site?

https://s16.postimg.org/v9okvye11/IMG_7472.jpg

 

[ThRoewer]

That doesn't look like fin-rot to me. Fin-rot is bacterial and looks usually white and and as if the fin is melting away.

This looks more like damage caused by another fish.

Sent from my XT1254 using Tapatalk

 

[Zalick]

Hard to tell from the video and pic. Have you seen the coral beauty being aggressive? You might read this thread on flukes.

Did you QT the coral beauty? FW dip it?

Flukes cause fin damage that seems to progress. Once enough are on the fish, it will die. You can't see them unless you do a FW dip and then they fall off and turn opaque.

If you suspect flukes, you should dose the tank with Prazi. I've never dosed my DT but if Prazi is safe for snails, then dosing the the DT would be a good idea.

 

[Jandrix]

Thanks for the replies,

The clown's tail seems to be whole again and only the black blotches remain so I'm going to keep a close eye on her, if I see any more signs of flukes I'll does the tank with Prazipro which I have ready on standby. The fish are both eating well, breathing normally, and have lots of energy though so I don't think it is flukes.

I also noticed the coral beauty had a normal poo yesterday, just looked like a few fine grains of white sand. I think the green stringy poo I saw when I first got it may have been stress related as it wasn't the white colour you normally see with worms.