First off I want to say hi as this is my first post and most likely not the last!
The reason ive joined is to get some advise, today i brought a blackmore but already had one so not sure which this is they are similarly size, and why he was purcased.🤔 Paying very close attention as you do and I noticed what at first I though was sand/white spot starting from the stress of the move as it does happen you maybe know. I didnt add the shops water to my own i will to add. But after an hour it was longer and now from the included video changing. Am I over reacting? Is it just a scale falling off? I tried to get a good photo but i couldnt focus on it long enough.
I think it's most likely he was injured while being netted/transported (although that's not to say that the stress of the move might not have an impact on how well this heals). Keep an eye on him over the next few days, don't overfeed, and ensure that water is in tip-top/optimum condition with 0 ammonia, 0 nitrite and nitrates no more than 20 above your tap water nitrates level; the best way of doing this is by daily partial water changes. As you've added an additional fish, this is all the more important as the filter bacteria will have to play "catch-up" to process the extra fish waste, so I'd recommend doing 10-20% water changes daily. Check out the Caresheet section for further advice and tips on ensuring that you're keeping the fish in line with their requirements https://www.fishkeeping.co.uk/modules/ ... esheet.php?caresheetID=50 and https://www.fishkeeping.co.uk/coldwater_articles/, as well as http://injaf.org/aquarium-fish/the-goldfish-section/. Hope that helps.
[Edited to add: I've just read another post in which you mention a 50-litre tank; if this is the tank with the two blackmoors, then I'd advise increasing those daily water changes to 40% and take a good read of the links above, especially with a view to upgrading the tank size ASAP.]
Yeah I think you were right, I took him out late kast night for a closer look and it rubbed off in the net to reveal a very small bit of tissue damage. It looks nearly healed today though I think my concerns are over.