Hi, thanks for the reply.

The heater is in an external filter so not heater burn, it does seem to be an injury. Thanks for the advice on tank size we are already talking about an upgrade to a 230L tank we have seen in the new year, I will probs also go for some plants too if we get the new tank, to help with the Nitrates.

Postcode search on United Utilities states following:

Water Hardness Clarke (English) = 7, online conversion to German = 5.62
CaCo3 = 100 ppm
Nitrate 9.41, so 20 above tap water gives me circa 30 for the tank, test strip colour between 25/50

I have two brands of test strip, so my readings for hardness seem to be correct with suppliers figures for my area. As for Nitrates the tank is due for a water change at the weekend, so No3 usual drops back down to <20 once done. Ammonia tests have been done with API fluid test kit, and I also have an in tank Ammonia alert as a permanent visual warning.

What are your thoughts on continuing with bicarb when doing the water change, I have read 1 tsp in 100L raises approx 2 dKH, so I usually add 1/3 tsp to my 30L water changes in an attempt to keep the figures up.

Also as I have just added aquarium salts, should I add more when doing this weekends water change, to help with the healing process of my Angelfish? ie enough salts for the 30L of new water.

Thanks for the advice. Lee

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.