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taiwwa 02-01-2013 03:59 AM

Betta fish much smaller than others
 
I had a brood of bettas. Six made it past the initial hatch stage.

It's a few months later. Two of them are about 2 cm. Another is 1.5

And one or two is less than a cm. It is very much smaller than the others, seems stuck in its development.

What is going on?

Virto 02-01-2013 03:57 PM

Bettafish.com has a ton of info, and the breeding section there has some experienced folks that could probably help you out.

MSG 02-01-2013 04:03 PM

Will need some more info if you want answers.
 
  • What size is your spawning tank?
  • What size is your grow out tank?
  • How often did you change the water?
  • Did you have live plants in any of these tanks?
  • If so, what species of plants.
  • What foods have you fed the fry?

Photos would be helpful too.

Are all of your bettas still in the same tank?

Largest juvie from my spawn in mid October 2012 is at least 4cms.

aokashi 02-01-2013 04:04 PM

Betta fish much smaller than others
 
15 Attachment(s)
keeping baby bettas means Water changes water changes and more water changes. if you dont change the water everyday in a small tank, they are going to grow slow.

Each fry releases growth stunting hormones into the water to try and limit it's competition in growing up. this can only be eliminated with water changes.

other than than, feed an adequate high proteins diet as there are carnivorous fish. live foods such as tubifex? blackworms and what not will be highly appreciated.

Option 02-01-2013 04:56 PM

Quote:

Originally Posted by aokashi (Post 2416690)
Each fry releases growth stunting hormones into the water to try and limit it's competition in growing up. this can only be eliminated with water changes.

I've heard this theory before. It's interesting b/c it begs the question....why doesn't the hormone circulating in the water also affect itself?

taiwwa 02-01-2013 04:59 PM

10 gal.

Don't know about grow out. They were spawned there and I left them.

Significantly planted tank. Water wisteria and duckweed.

Changed water infrequently.

This tank had significant planeria growth for them to feed on. Of the two that I took out, they act unlike other bettas in that they're always hunting for food on the bottom gravel.

pmcarbrey 02-01-2013 05:08 PM

Quote:

Originally Posted by Option (Post 2417202)
I've heard this theory before. It's interesting b/c it begs the question....why doesn't the hormone circulating in the water also affect itself?

It is not a theory. Tests have shown that many young fish do this. And the hormone doesn't affect the fish which released it for the same reason you are not attracted to your own pheromones, it is keyed to the individual, from what I understand it does slightly affect the growth of individual, but only to a slight extent as compared to what it does to others

If you wish to raise bettas as successfully as is possible you need to split them into groups based on size once it becomes some are out growing others, on top of this you also need to do regular water changes (due to the small tanks often used for grow outs I'd recommend 50%+ a week using aged tap water) in order to ensure the fastest rate of growth possible

aokashi 02-01-2013 05:38 PM

Betta fish much smaller than others
 
15 Attachment(s)
Quote:

Originally Posted by Option (Post 2417202)
I've heard this theory before. It's interesting b/c it begs the question....why doesn't the hormone circulating in the water also affect itself?

Some says that it does also to a certain extent. this experiment is not hard to repeat. buy 2 baby betta from a breeder, of the same age and size. put each in the same environment. except one gets water changes whilst the other does not.

ShortFin 02-01-2013 06:19 PM

6 in a 10 gal is not many. Your 2 smaller ones are not eating as much food as the larger ones. Or it might be the runts of the litter.


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