Guppy Looks Sick?

shrimpmama

Hey everybody! So the last two days our guppy, Sherbet , has been looking kind of darker closer to her tail and has been staying to the bottom more. She still comes up to say hi when we go to chill by the tank, but the other three guppies with her seem to be moving more and out and about. Usually she is right along with them but lately not so much, so we are not sure what is going on and if she will be okay. We did water tests yesterday and everything looks fine and the others are doing great too. I have some pictures of her to maybe see if someone can tell what is going on?
Between her back fins she isn't usually this dark, it doesn't show as well in the pictures but that spot is fairly black and she has always been bright yellow.
 

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Pwilly07

Hey everybody! So the last two days our guppy, Sherbet , has been looking kind of darker closer to her tail and has been staying to the bottom more. She still comes up to say hi when we go to chill by the tank, but the other three guppies with her seem to be moving more and out and about. Usually she is right along with them but lately not so much, so we are not sure what is going on and if she will be okay. We did water tests yesterday and everything looks fine and the others are doing great too. I have some pictures of her to maybe see if someone can tell what is going on?
Between her back fins she isn't usually this dark, it doesn't show as well in the pictures but that spot is fairly black and she has always been bright yellow.
Please fill out the emergency template so people can better help you.
 
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shrimpmama

Tank
What is the water volume of the tank? 5.5 gallons
How long has the tank been running? 6 months
Does it have a filter? Yes
Does it have a heater? Yes
What is the water temperature? 74-75°F
What is the entire stocking of this tank? (Please list all fish and inverts.)
4x Adult guppies (3 female, 1 male)
2x small (~1cm dia) nerite snails

Maintenance
How often do you change the water? 1ce weekly
How much of the water do you change? 20-30%
What do you use to treat your water? Seachem Prime
Do you vacuum the substrate or just the water? Vacuum substrate and rotate position of rocks and other decor weekly

*Parameters - Very Important
Did you cycle your tank before adding fish? Yes
What do you use to test the water? API liquid tests
What are your parameters? We need to know the exact numbers, not just “fine” or “safe”.
Ammonia: 0ppm
Nitrite: 0ppm
Nitrate: 0ppm
pH: 7-7.5

We have been performing a wider assay lately,
Total hardness 8 dGH
Total alkalinity 5 dKH
Phosphate... recently acquired, having trouble discerning the color so we cannot be certain it read 0. Most recent test was on Saturday and we performed a 30% water change and a cleaning shortly afterward to be safe.

Feeding
How often do you feed your fish? Once daily in the afternoon
How much do you feed your fish? Enough to give each fish sufficient food to eat in ~30sec but careful to not overfeed
What brand of food do you feed your fish? Varied diet which consists of Hikari tropical micropellets, Fluval bug bites color enhancing flakes, and Fluval spirulina flakes. Only one served in a given day.
Do you feed frozen or freeze-dried foods? No

Illness & Symptoms
How long have you had this fish? Since March (about 4 months)
How long ago did you first notice these symptoms? Several days ago.
In a few words, can you explain the symptoms? Unusual behavior, reduced appetite and signs of confusion. Discoloration between anal and dorsal fins.
Have you started any treatment for the illness? I administered a standard dose of stress coat to the tank yesterday.
Was your fish physically ill or injured upon purchase? She and her female companions showed signs of stress, others had signs of illness but this fish did not.
How has its behavior and appearance changed, if at all? She has become more reserved and keeps to herself more than usual. The area between her anal and dorsal fins has grown dark and she is moving more slowly. Over the weekend she was clamping her dorsal fin. She has since stopped but today seems to have some trouble breathing (panting gills).

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)

We know Sherbet and her companions were stressed by the store they came from, but they have all been stable and healthy since the end of March. For almost a week Sherbet has been less social, staying away from the other fish. Her movement is more slow and she has either reduced appetite or is simply slow to respond when food is added to the tank. She will overshoot and miss food when trying to eat, but eventually gets it.

We have seen similar behavior in some of our other guppies before they give birth so last week we expected this was normal. The same behavior pattern emerged in another female in this tank two weeks ago but she began acting normally after about 5 days and did not show physical signs of injury or illness. However Sherbet here has begun showing signs of distress (occasionally clamped dorsal fin, and today panting gills) and the darkening of her midsection looks concerning. We don't know what this means or how to treat it.

Sherbet is the bright orange and yellow lady in the photo. She is usually yellow throughout her body.
 

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Pwilly07

Bump!! I am not sure what is causing this! Can anyone help out??
 
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shrimpmama

Just wanted to update, Sherbet is still hanging in here, we have tested the water every other day and continue to see no ammonia, nitrite, or nitrate. She has some good days, with more energy, and some where she is more tired.

Some of the plants in the tank have been shedding and stopped growing recently after we changed to a smaller light, so we put the larger one back in over the weekend, don't know if this is indication of anything or just too little light. We are out of ideas. We have an airstone to ensure enough oxygen in the water for the fish and good turnover from the bottom of the tank. Please correct me if I'm wrong, Sherbet is hanging out and resting down at the bottom of the tank, if she was not getting enough oxygen, I would expect she would be at the top of the tank instead and that it would affect her friends as well.
 
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