My betta, Cwtch, has been healing from some shredded fins and that was going well (removed supposedly betta safe plastic plant that was the culprit and moving to silk and real plants).
I check him closely a few times every day to make sure his fins are not getting worse. He was starting to show some new growth transparent/whitish skin on the edges so all seemed well.
Last night I noticed in areas on his fins(all except ventral and pectorals)where there is no shredding that there are spots where it's like his skin is becoming thin and you can see light through them. I don't mean tears now but if the fins were thinner, it looks like he'd have small holes starting.
The edges of the fins that were healing look ragged now and new growth has stopped.
His body looks normal. I can't find anything wrong with him there. He's his normal bright blue colour other than showing a bit more of his turquoise colour that usual.
I have a pic of him from last Wednesday and one from today. I only have my phone camera today. The thin areas don't really show up well in today's pic but you can see the ragged edges. They are not black or discoloured.
Here is the form to help out.
What size is your tank? 10 gal
What temperature is your tank? 80F
Does your tank have a filter? Yes. Tetra Whisper 10i
Does your tank have an air stone or other type of aeration? No
Is your tank heated? Yes. New adjustable heater last week as old heater only stayed at 77F
What tank mates does your betta fish live with? 4 Swift Rasboras
What type of food do you feed your betta fish? Omega One Flakes(it's what he prefers)
How often do you feed your betta fish? Around 4 big flakes in morning and 4 in evening. One day a week of fasting.
How often do you perform a water change? Once a week .
What percentage of the water do you change when you perform a water change? 35% each week but on Sunday did 55%
What type of additives do you add to the water when you perform a water change? API Stress Coat+ (double dose as per instructions for treating fins)
I normally test water every second day with API Freshwater test kit(not strips)
Symptoms and Treatment
How has your betta fish's appearance changed? Fins thinning in centre areas, almost to the point of tears. Edges that were healing from tears seem more ragged.
How has your betta fish's behavior changed? He's acting normal and eating normal.
When did you start noticing the symptoms? Last night. July 1.
Have you started treating your fish? Was in the process of treating tears with double dose API Stress Coat. Added aquarium salt last night when I freaked out as per directions on box for 10gal tank. (1tbp per 5 gal)
Does your fish have any history of being ill? Tail shredded from stupid plant from a stupid new owner(me).
How old is your fish (approximately)? I've had him 7 weeks. I'm guessing he's under a year old.
I don't have a hospital tank. I'll get one if I need to remove him from his little rasbora tank mates(they are all looking and behaving normal).
The only med I have on hand is a bottle of Nox-Ich (it's .050% Sodium Chloride and 0.50% malachite green). It was just something that was bought at the same time as my tank but never used.
Any help is much appreciated.