Dead fish - what's the red spot?

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arandazzo88

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I have a guppy that doesn't look like it's been eating for a couple weeks and not very active. He either hides in the top corner of the tank or practically resting on the bottom. Today he finally died.

I have a 30gal and only had 3 guppies. Tank was semi-planted and well established.

Upon closer examination I found a big red spot on top and smaller one on the bottom as shown in pictures.

I'm thinking parasites based on previous research. Any other thoughts?

If it's parasites, is that contagious? What's the treatment process based on what you think it is? I'm only a little over a month old in fish keeping.
 
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arandazzo88

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I should add that my other 2 guppies attempt to eat but all I ever see them do is spit the pellet back out. They are more social and active than the one that died though, so maybe they're eating and I'm not seeing it. I also see them pick on my java fern.
 
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arandazzo88

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Oh and then this is one of my guppies which appears to have fin rot?

What's going on in my tank!? These are the first fish I've ever had and I've tried to do everything exactly right!
 
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Tanks and Plants

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It COULD be hemorrhagic septicemia. I also learned that a fully cycled tank with very few fish can show water parameters of zeros across the board. I throught that the nitrates should show something but if the bioload is so small it will show zeros in a fullly cycled tank.

Good Luck!
 
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Sometimes my Nitrates get up to 20 and then I do water changes. This is not a cycling issue. Look at the pictures I'm posting. There's signs of internal bleeding on the dead fish and fin rot on the live fish.

I need a differential diagnosis and treatment plan.
 
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