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Is there something wrong with my Angelfish

Subject: Is there something wrong with my Angelfish
by Lskillan on 28/12/2018 22:05:11

Hi all,

We currently have 2 Angelfish, I assume we have a male and a female as they have laid eggs in the past.
The smaller of the 2 we think is a female, which has recently developed a sore, or possible wound from an attack off another fish near to the base of its pectoral fin, the larger Angel does appear to chase and bully the smaller one. I have attached a picture, I'm hoping this is something that will heal, and not a disease of any sort, has anyone seen this before? A local store and a friend recommended aquarium salts, which I've added today.

Any other help greatly appreciated, Lee

Some current tank stats, we have 2 Angels, 7 Guppies, 4 Dwarf Gourami, and a Bristlenose Pleco
Tank size 90L
Sand substrate
Ammonia 0
Chlorine 0
Nitrite 0
Nitrate 25-50
dGH 5
dKH 6
PH 6.8
Temp 76 F

We only have artificial plants, I change around 30L of water every 5 days to keep the Nitrate down using a syphon also to clean the poo from the substrate, often adding some bicarbonate of soda to new de-chlorinated water as we live in a soft water area, every couple of days I use a gravel cleaner to keep the tank clean.