need a pure black fish

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bazil323

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May 1, 2008
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"Regular" mollies are smaller than sailfins. Balloon mollies are "regular" mollies that have been bred to have a very large round belly and a shorter body. This means that they tend to have digestive problems because of the contorted nature of their organs due to the severe shortening and "fattening" of their abdomen area. I would pick "regular" mollies over balloons any day.

I would not say that one is more aggressive than the other. Mollies are quite peaceful. They are curious and might try to eat things like snails or shrimp just because they are hungry little beggars. They seem to be the most puppy-like of the fish I've encountered. They are always begging at the front of the tank whenever they see me.

I tend to think they do best with very light addition of marine salt as my most healthy ones are in my brackish tank. I've had juvies/adults survive in my 75g freshwater community, but they seemed to grow slower and not be quite as healthy as the ones in my brackish (1.008) tank. I don't think you need to go all the way to brackish, just add a small amount of marine salt. If you go that route, mix up your water in a separate bucket (rubbermaid tubs work great) the night before a water change and make sure that all the salt is completely dissolved. Powerheads work great to make sure the salt gets worked in.
 

platytudes

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Balloon mollies move somewhat slower and have a shorter shape, but they do have digestive/health issues due to their abnormal abdomen, as was mentioned. If you go with them, definitely make sure they get their greens. Nori was a favorite of my mollies. This was a helpful article for me when I was researching their needs:
The truth about Mollies; Among the most popular aquarium fish, they’re also among the most misunderstood

I agree with making the tank slightly brackish for mollies, maybe 2 tablespoons of marine salt per 10 gallons at first? But do mix it up separately (with a heater and powerhead is best) and use it for your water changes, don't add it in directly.

Sailfin mollies or regular black mollies will eventually outgrow a 14 gallon tank.
 

Fishfriend1

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Dec 11, 2009
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What about a normal black mollie. I dont think they get to big. Just don't keep 2 or be ready for fry.
 

Fishfriend1

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btan

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Nov 25, 2009
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A black betta would definitely be a good choice! Just make sure you don't have any other fish in the tank with big fan like tails in the tank as bettas can perceive them to be competition.
 

froglover007

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Apr 15, 2009
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I like balloon mollies, although they definitely have their problems. Regular black mollies would be neat and do not outgrow that tank.
 

FISHSHROD

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Aug 18, 2005
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I love that tank, FISHSHROD! One of my tanks has a black background, and I was considering changing it to blue, now I can see how it looks. What is your background made of?

rustoleum paint
 

Devin or Icon

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Jul 14, 2017
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Black goldfish won't stay black for a long time even if there is one that would fit well there. How about black mollies, guppies and swordtails? Black bettas are very rare though. Hmmm...Black neon tetras?
I understand this post was from many years ago but i was wondering how rare are pure black bettas. I just got a pure black crowntail from my local pet store (pets supplies plus) and decided to look up how rare they are and have not found an answer if you could tell me that would be awesome if not that is ok
 

SnakeIce

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There are 6 black crowntail bettas out of the 75 crowntail bettas on aquabid. They may be less rare now than they were back when this thread was.
 
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