Setting up nanonano tanks... - The Planted Tank Forum
 
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post #1 of 6 (permalink) Old 11-20-2014, 06:04 AM Thread Starter
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Setting up nanonano tanks...

My son wants to do a fish hybridization project next semester and thru the summer. I was thinking of using guppies and mollies (small size, short generation interval, will cross, easy to breed) and keeping them individually in upright 2L bottles (connected to a central pump/filtration system).

Thought about platys and swordtails but too big? Anybody keeping these in a half gallon?

What plant would be best to let float in each bottle? Are there any small egglayers I could use?

Thanks for any constructive advice. I've never kept tiny tanks!
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post #2 of 6 (permalink) Old 11-20-2014, 05:11 PM
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Quote:
Originally Posted by m1231e View Post
My son wants to do a fish hybridization project next semester and thru the summer. I was thinking of using guppies and mollies (small size, short generation interval, will cross, easy to breed) and keeping them individually in upright 2L bottles (connected to a central pump/filtration system).

Thought about platys and swordtails but too big? Anybody keeping these in a half gallon?

What plant would be best to let float in each bottle? Are there any small egglayers I could use?

Thanks for any constructive advice. I've never kept tiny tanks!
Non of the fish you listed can be properly kept in that small a size tank(s) (2L-1/2g), they will have no swim room, it will not be fair to the fish.

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post #3 of 6 (permalink) Old 11-20-2014, 06:33 PM
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+1 Waaay too small a space for these fish.

I've kept endlers in a 1/2g container, but males only (both for their tiny size and to prevent population increases from breeding) and *only* in a bowl or vase that was
a) moderately to heavily planted to help ensure good water quality
b) shaped such that it provided good surface area for gas exchange
c) of a size and shape to allow a minimum of 8x the adult fish's body length in swim room.
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post #4 of 6 (permalink) Old 11-20-2014, 07:33 PM
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You need a bigger tank for just about everything you're thinking of trying .

Java moss, water sprite, and/or Egeria of some species are all good, easy plants that can grow without rooting. If you're looking for egglayers, Zebra danios are a classic, and they're used extensively in scientific research (look up zebrafish in the literature). Also, just to be clear, with any species of fish it's going to take several months for the fry to reach sexual maturity. According to wikipedia, it's 10-20 weeks for guppies and 3 months for zebra danios. You could also look into Endler's Livebearers, which are similar to guppies and stay even smaller. In any case, a 10 gallon or larger would be better.

I hope this works for you, but I don't see anything doing well in 2L soda bottles besides snails.


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post #5 of 6 (permalink) Old 11-23-2014, 04:16 AM Thread Starter
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dpod, thanks for the helpful advice

Couple of points- the fry don't have to reach maturity for this iteration. f1 and f2 crosses would be next year's project, I suspect. They just have to get big enough for us to compare growth rate and fin characteristics.

What can zebra danios be hybridized with? The whole point is to cross two species in the same genera and study traits in the resulting offspring. Searching the lay literature.. I don't turn up much. Am I just missing it?

Thanks again for the benefit of your experience.
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post #6 of 6 (permalink) Old 11-23-2014, 04:23 AM
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Sounds like a fun project! Looking forward to following along!
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