Concerned about my black skirt tetras fins and one white spot on My green glofish tetra

[kittenlover9876]

Tank
What is the water volume of the tank? 20 gallon
How long has the tank been running? December
Does it have a filter? Yes
Does it have a heater? yes
What is the water temperature? 76f
What is the entire stocking of this tank? (Please list all fish and inverts.) 4 glofish tetra, a black skirt tetra, a white skirt tetra,
a small panda molly (same size as the tetras but small for a molly), 2 moss balls, and a rabbit snail
Maintenance
How often do you change the water? every 2 weeks
How much of the water do you change? 5 gallons/ 25%
What do you use to treat your water? tetra aquasafe
Do you vacuum the substrate or just the water? the substrate

*Parameters - Very Important
Did you cycle your tank before adding fish? No ( (had to do an in fish cycle with one of the glofish i used tetra safestart and cleaning bacteria and made sure ammonia was gone before adding new fish and snail)
What do you use to test the water? Test strips and ammonia master test (I have a full master test but the warnings on the bottles scare me)
What are your parameters? We need to know the exact numbers, not just “fine” or “safe”.
Ammonia:0
Nitrite:0
Nitrate:40
pH:7.2

Feeding
How often do you feed your fish? twice a day
How much do you feed your fish? a pinch
What brand of food do you feed your fish? tetra color tropical flakes
Do you feed frozen or freeze-dried foods? no

Illness & Symptoms
How long have you had this fish? the green skirt i got yesterday and the black skirt i got a week before that
How long ago did you first notice these symptoms? today
In a few words, can you explain the symptoms? a single white spot on the green tetra and what appears to be white fuzz on my black skirts fins
Have you started any treatment for the illness? no
Was your fish physically ill or injured upon purchase? the black skirts fins were a little ripped, but he has a little longer fins so i assumed his tank mates at the store did it, or he did it on accident, and it would heal
How has its behavior and appearance changed, if at all? behavior hasn't but appearance has as stated above

Explain your emergency situation in detail. (Please give a clear explanation of what is going on, include details from the beginning of the illness leading up to now) I've had ich in this tank before, and it wiped out my entire tank except one glofish tetra. It appeared the day after buying them in pictures but i didn't notice until a couple of days later. It was way over two weeks since i last spotted any signs of ich before I put the new fish in the tank. so because I am paranoid I decided to check on my fish I bought yesterday. I noticed one single white spot on the green tetra on her bottom fin and towards the front and what looks like white fuzz on the black tetras fins. I'm a little worried because when I went to the locally owned fish shop I got him from the tank he was in was quarantined because several of the black skirts had died of unknown causes. I provided pictures below. sorry about the black skirt being blurry he kept moving before my camera could focus.

 

[PheonixKingZ]

Looks like ich to me.

Fungus Cure will work for the ‘fuzz’ on the Black Skirt Tetra: https://www.amazon.com/dp/B001OIQE5C/?tag=ff0d01-20 (dose as instructed)

Ich can be cured by the following:

“Ichthyophthirius, more commonly known as ‘ich’, is one the most common aquarium disease. Bettas are hardier than most other fish, but they still can develop it. Ich is a parasite that attaches itself to a fish’s skin. The parasite sucks the fish’s blood until it is big/strong enough to detach itself, then it floats to the bottom. There, it splits up and reproduces. At this point, you will not see any white spots on the fish. After some time has passed, the parasite will have ruptured, releasing hundreds of new parasites into the water, all of which are looking for a new host. Some think that Ich is not deadly for a fish because it is not internal; that is simply not true. When the parasite detaches itself, it leaves a little scab on the fish’s skin. You may not think this is such a big deal, but if the fish had hundreds of these on its gills, this can make it difficult for the fish to breath, causing death.

Treatment is simple enough but requires dedication. The ‘Heat Treatment’ is probably the most common and one of the easiest treatments. Increasing the temperature of the water to 86F for 2 weeks will usually kill off the parasite. If the water is below 75F, then the temperature should be raised to 86F slowly, over a 24-48-hour period. Another method of treatment is with any medication that contains Malachite Green. Malachite Green is a chemical that contains powerful anti-fungal properties, that can easily kill parasites. Please note that Malachite Green is known to cause cancer, so you should always wash your hands after coming into contact with this chemical.”

(https://www.fishforums.net/threads/betta-research-paper.465208/ | https://www.fishforums.net/threads/what-is-ich.7092/page-2)