Platties Not Breeding... I Thought They Were More Prolific Breeders

dsiegel13

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I have had my platties for almost two months now, and in all that time I have only had one birth event. None of the others even look pregnant, and the one that did give birth (2-3 weeks ago) is not pregnant again. I do not want a tank full of fry or even for most of the fry to survive, but if there is a problem in the tank that is causing them not to breed, I want to correct that and resolve any anxiety or stress that is keeping them from their normal behavior.

I have 8 platties in the tank, 2 males, 6 females. One of the males is pretty aggressive to the other but in a non-violent way, just chases him a bit. The big male is about 1.5-1.75 inches, the smaller male is about 1.5 inches and all the females are between 1.5-2.0 inches (the 2.0 inch female is the formerly pregnant one).

My tank specs are - 10 gal; pH - 7.0, Alkalinity - 80; Hardness - 75; Ammonia, Nitrites - 0; Nitrates - 20. I change the H2O every week about 25-35% each change. They eat once a day in the morning, and the tank light is on for approx 6-8 hrs daily (do I need to set the mood for them?) The tank is moderately planted and there are 3 good hiding spots, including a coconut shell cave.

All help is appreciated.
 
They'll soon start...

I suspect that what's happening is that the females are young and so are producing only small litters of fry, which are being eaten.

As long as your stats stay as good as they are, and the fish look healthy and eat well, you shouldn't worry.
 
They'll soon start...

I suspect that what's happening is that the females are young and so are producing only small litters of fry, which are being eaten.

As long as your stats stay as good as they are, and the fish look healthy and eat well, you shouldn't worry.

Okay great! I was worried.

At about what size/age do the females become sexually mature? I am not sure what age they are, got them from the LFS about this same size, maybe a tiny bit smaller/leaner?

I did notice today that some of them were congregating in the coconut cave, and one was the small male (way to go boy!), so maybe I need more hiding/private encounter areas.
 
They become mature at a couple of month old. They really don't need any privacy; they'll breed in bare tanks; they're not at all coy!
 

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