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Old 05-07-2022, 12:35 AM   #1
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Unhappy Young Platy Suddenly Lost Weight

So I was just watching my fish tank as one does, and I noticed that a fry I've had for roughly 6 months (born in my tank) was suddenly really skinny, unlike her normal plump appearance.
I did some research, and I'm thinking it may be internal parasites, but some help or feedback would be nice.
1~What type of fish is afflicted? In addition, please describe what is wrong with the fish to the best of your ability (i.e. cotton like growth, bloated, etc.). A young silver-and-black female platy, she suddenly lost basically all of her weight/size and her fecal waste looks abnormal.

2~What are your tank parameters (ammonia, nitrites, nitrates, temp, pH)? Please give exact values. I'm unsure, since my liquid test kit is outdated and the test strips I have are old and bad. Hoping to get a new liquid test kit soon.

3~How large is the tank? How long has the tank been set up? 10 gallons, about a year and a half.

4~What type of filtration are you using? Please give the name and number (i.e. Fluval 304) and amount of gph if known. Top Fin Small Silenstream PF-S, gph unknown.

5~How many fish are in the tank? What kinds of fish are they and what are their current sizes? About 11 fish; 8 platies (not including affected fish) [3 adults, 5 fry], one small bristlenose pleco, one medium cory catfish, along with two mystery snails and possibly one small ghost shrimp.

6~When is the last time you did a water change and vacuum the gravel? How often do you do this? How much water do you remove at a time? Last water change was a couple weeks ago, haven't vacuumed in a bit. I don't do water changes too often due to other plans and an unfortunately huge lack of motivation, and vacuuming is a rare event.

7~How long have you had the fish? If the fish is new, how did you acclimate it/them? She's been around for roughly 6-7 months and was born in my tank.

8~Have you added anything new to the tank--decor, new dechlorinator, new substrate, etc.? A couple new small plants, yes.

9~What kind of food have you been feeding your fish, have you changed their diet recently? Nutrafin flakes and discs, no recent diet change. They're also fed flakes every 3 days and discs every 2 days.
Pictures of the fish will be posted tomorrow/the day after this was posted due to phone limitations, my apologies.

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Old 05-07-2022, 11:13 AM   #2
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Here are the pictures. Not very high quality, my bad.
If this helps at all, imagine the belly of a platy as a grape. Now squish the grape and cut it to half its size.
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fading, fading coloration, fading colors, platy, platy fish, platy fry, possible worms, skinny, sudden, sudden weight loss, thin, weight loss, worms

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