Fungus?

Is this fungus? It’s on both sides of the fish?

It doesn't look like fungus or mucous.

How long has it been like that?
Is it in the same place on both sides of the fish?
What are you feeding them, anything white?
Is there any filter wool in the tank?
Have you added anything to the tank in the 2 weeks before this started?

Colin_T said:

It doesn't look like fungus or mucous.

How long has it been like that?
Is it in the same place on both sides of the fish?
What are you feeding them, anything white?
Is there any filter wool in the tank?
Have you added anything to the tank in the 2 weeks before this started?

Click to expand...

Yes exactly the same place both sides the only thing I been feeding them in the community tank that I can think off is brine shrimp that’s fell to the bottom?

current chemicals in their are tap safe and anti hair algae.

the filter is an external one from allpondsolutions (cheap EF-150)

It's not brineshrimp so the food part is fine.

Stop using the hair algae treatment and do a 75% water change and gravel clean the substrate every day for a week. Make sure any new water is free of chlorine/ chloramine before it's added to the tank.

Clean the filter if it hasn't been done in the last 2 weeks. However, if the filter is less than 6 weeks old, do not clean it. Wash the filter materials/ media in a bucket of tank water and re-use them. Tip the bucket of dirty water on the garden/ lawn.

Then monitor the fish and see how it goes. If it gets worse, post more pictures.