How Many Platies?

alexandramew

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So after many aquarium visits and discussion I have decided to make platies the main feature of my tank. I have gotten a whole range of different opinions for how many platies I can fit in my tank so am looking for a more solid answer!
I have a 90 litre tank (which is just short of 24 gallons) which is currently stocked with 6 bloodfin glass tetras, 5 cory cats and 5 platies. Is it possible for me to get more platies, and if so how many? There are some plants and an ornament in the tank. We've had it for around 4 months and had no issues outside of a dwarf gourami death thanks to iridovirus. We do weekly water changes of around 30% and water parameters are always stable and good.
 

Luciferene

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It would depend on what type of cory cat you have, but regardless I wouldn't get more unless you're only keeping one sex of platies.

Even with other fish to eat the fry, eventually some will survive and they can overpopulate.
 

SFGiantsGuy

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I agree. With livebearers in tanks all the way up from a 10 gal. to a 75 gal, always take in account and anticipation for the pending extra space that will be utilized for any possible bioload additions. I wouldn't get any more fish unless it's maybe another bottom feeder or 2.
 
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alexandramew

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Thanks for the feedback, I knew there was something I wasn't considering when I was getting different responses.
 

SFGiantsGuy

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Usually "tank space" is a gross generalization and universally considered, but a bit of a different factor to your overall bio-load in comparison; sure, one is kinda like simple physics, and the other is a biological standard per the ecosystem and it's parameters. Both are equally important, although the primary difference being, your bio-load will greatly wary in what creatures you submit within the tank. Thus, in essence, with Platys, it's always important to consider their biological behavior, kinda like a forthcoming 3rd dimension: as there is a high probability that there will be more born. I have one 10 gal. with only 2 females and 1 male, which almost inevitably has increased over about a year after about 10 out of about 20 fry had survived, therefore increasing the bio-load of the tank. Bascially, when stocking livebearers, you always wanna allow yourself (and the fish) a certain amount of "slack", meaning more space. Simple concept, but important in the long run.
 

MissRuthless

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Also keep in mind that platies are legit poop machines, and they do get sort of big. They have a higher bioload than most fish their size that needs to be accounted for.

...aaaaand as @SFGiantsGuy said, if you are keeping both sexes they WILL end up overpopulating the tank in time. If not for their bioload, I would take this as reason enough not to add more. You'll have more soon whether you buy them or not.
 
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