This is my first post so apologies if this has been discussed already. I am just looking for advice if anyone has encountered the same problem because over 6 years with an aquarium I have never witnessed this.
Last weekend I bought probably one of the most beautiful angelfish I have ever seen, it was a veiled angel and looked like a ghost swiming in the water, so I had to have it. Also one of my old angels had died recently so I thought this would be good for the one remaining angelfish.
When I brought the fish back home and acclimatised him with the tank and released him, he seemed nervous at first, but this is normal for fish so I switched the light off for a while to let the fish calm down a bit. After a few hours I switched the light on and saw my keyhole cichlid following the angelfish around, iassumed that this was not unusal since the keyhole has done this with my other angelfish for months, then I could not believe what I saw, the keyhole cichlid bit the angelfishs tail and hung on while the angel attempted to get away tearing the fins in his wake.
I was horified but thought, this is him just making his mark on his territory, so I switched the light off but the next morning I went down and the veiled angel had lost half of its fins, the keyhole was still swimming with him and staring him out of it so I removed the keyhole promptly.
What can I do though to curb this from happening as I want to release the keyhole back in asap
Oh and the good news is, the angel, even though it looks shredded to pieces, was swimming about last night responding to me and eating very well obviously I have also put some finrot treatment into the water also.
Sorry for being so long about explaining this but any help would be greatly appreciated.