Aggressive Male Platy

happygolucky

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I have 3 male platys in a 20 gallon tank, currently cycling it(Sachem Stability and Prime), and there is one total jerk. He never stops going after other fish, and I think it's stressing them out. He picks one to chase, chases for 2 min, then calms down, and chases the other for a bit. I don't know what to do because if the mean one isn't chasing, then a different one is chasing another fish. I seem to have gotten the most aggressive male mickey mouse platys possible.....I don't know what to do. I have a 5 gallon that I was planning on fish-less cycling, but now I may have to move my most aggressive to the 5gal, and see how the other two do. Should I do this soon? I've had all 3 for 1.5 days, that's it!

He seems to chase them, then sort of bump into them until they move. I would think his dominance has been established, but he doesn't stop.
 
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happygolucky

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UPDATE: Since I could not wait any longer for an answer, I have moved my most aggressive into the 5 gallon(added Stabiltity along with Prime), for hopefully only 2-3 days. The problem is, now it seems 2nd in command is taking over. He's now chasing my other platy I honestly have no idea what to do.
 

el337

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Do you have any decor or plants in your tanks so they have some places to hide? I have two female Kribs that are going thru something similar but I have driftwood, rock cave and lots of plants so they don't see each other as much and the less dominant one has places to hide.
 

Bijou88

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It's a pecking order thing, my male platies chase each other around too. Lots of plants, cover etc helps immensely, just so they can get away from each other.

 
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happygolucky

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I have a large cave, a "treehouse" that provides a great hiding place, and a smaller "tunnel" that can also be hidden in, I have many plants giving cover. I can certainly add more, but that would be filling my tank a lot, and I want to leave some room on the floor because I will be purchasing some cories after the cycle. However, if it will protect my less aggressive platies, then I can definitely buy some more hidey-holes. Also, my other 2 platies have calmed down, they no longer chase each other, I think they have decided who is the "leader" at the moment.
 

el337

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Is the most aggressive one still in the 5g? I believe I read in a couple of other threads that some people have the most aggressive one in "time out" by themselves in their own tank for about a week.
 
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happygolucky

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After examining one of my platies, I see he has fin rot(90% likely he got it from store, and I didn't notice). Return the fish, or buy antibiotics? Fish seem to be very troublesome to keep

The fin rot is in early stages, the tail is mostly full, just a slight white outline at the end of the tail

I was reading up, and many articles said aquarium salt was a good idea, however everyone on here seems to hate it. Would it help an early stage fin rot, or should I use a different medication? If so, would the API Melafix do the trick?
 
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happygolucky

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Yes he will stay there for however long is suggested, may even cycle the tank while he's at it because I'm adding stability and prime to it lol.
 

Bijou88

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Fin rot can often be treated with clean water, you don't necessarily need meds. I know you're cycling so it will be tough, but try to keep the ammonia/nitrite/nitrate as low as you possibly can.

 
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