Brackish?

[Zante]

Wikipedia (I know... Not the most reliable source...) has guppies and mollies as brackish water fish... Is that right? Sounds weird to me...

 

[OldMan47]

It is dead wrong on guppies. They really don't thrive outside of fresh water. For mollies, pet shop mollies, not necessarily all of the over 20 different species called mollies, are euryhaline and can thrive in any water from slightly hard fresh water to full salt water. Some salt water fish keepers still use them to cycle a new saltwater tank and the mollies go right on thriving and reproducing in that environment.
As you have noted, wikipedia may be OK at giving you good hints at terms to research using something like Google, but their strength is not in accuracy. Nobody checks anything there for accuracy. With some of the misconceptions I have seen people here have, if those were the ones writing a wiki post I would expect all of those inaccuracies to survive. I particularly liked a wiki article about a wild swampy park system that gave the land area in both acres and hectares, except the results were tremendously different compared to using the correct conversion from one to the other. The conversion wasn't even applied backward since the ratio did not work out that way either.

 

[FishBlast]

It is dead wrong on guppies. They really don't thrive outside of fresh water. For mollies, pet shop mollies, not necessarily all of the over 20 different species called mollies, are euryhaline and can thrive in any water from slightly hard fresh water to full salt water. Some salt water fish keepers still use them to cycle a new saltwater tank and the mollies go right on thriving and reproducing in that environment.
As you have noted, wikipedia may be OK at giving you good hints at terms to research using something like Google, but their strength is not in accuracy. Nobody checks anything there for accuracy. With some of the misconceptions I have seen people here have, if those were the ones writing a wiki post I would expect all of those inaccuracies to survive. I particularly liked a wiki article about a wild swampy park system that gave the land area in both acres and hectares, except the results were tremendously different compared to using the correct conversion from one to the other. The conversion wasn't even applied backward since the ratio did not work out that way either.

Does this mean you can have a marine tank with mollies and clown fish for example? that would be awesome!

 

[Zante]

It is dead wrong on guppies. They really don't thrive outside of fresh water. For mollies, pet shop mollies, not necessarily all of the over 20 different species called mollies, are euryhaline and can thrive in any water from slightly hard fresh water to full salt water. Some salt water fish keepers still use them to cycle a new saltwater tank and the mollies go right on thriving and reproducing in that environment.
As you have noted, wikipedia may be OK at giving you good hints at terms to research using something like Google, but their strength is not in accuracy. Nobody checks anything there for accuracy. With some of the misconceptions I have seen people here have, if those were the ones writing a wiki post I would expect all of those inaccuracies to survive. I particularly liked a wiki article about a wild swampy park system that gave the land area in both acres and hectares, except the results were tremendously different compared to using the correct conversion from one to the other. The conversion wasn't even applied backward since the ratio did not work out that way either.

Dose that mean I can put a molly in my nano reef?
I was thinking about adding one fish, but just can't choose... I would definitely go for a black molly though...

 

[FishBlast]

It is dead wrong on guppies. They really don't thrive outside of fresh water. For mollies, pet shop mollies, not necessarily all of the over 20 different species called mollies, are euryhaline and can thrive in any water from slightly hard fresh water to full salt water. Some salt water fish keepers still use them to cycle a new saltwater tank and the mollies go right on thriving and reproducing in that environment.
As you have noted, wikipedia may be OK at giving you good hints at terms to research using something like Google, but their strength is not in accuracy. Nobody checks anything there for accuracy. With some of the misconceptions I have seen people here have, if those were the ones writing a wiki post I would expect all of those inaccuracies to survive. I particularly liked a wiki article about a wild swampy park system that gave the land area in both acres and hectares, except the results were tremendously different compared to using the correct conversion from one to the other. The conversion wasn't even applied backward since the ratio did not work out that way either.

Dose that mean I can put a molly in my nano reef?
I was thinking about adding one fish, but just can't choose... I would definitely go for a black molly though...

It seems some people already did it. But they look so out of place, LOL!

 

[OldMan47]

Yes, you can have common pet shop mollies in a tank with clown fish. Most salt water tanks I have seen have very low populations and a molly's propensity to have population explosions might be quite another matter. The salt does not interfere with reproduction either.

 

[FishBlast]

Yes, you can have common pet shop mollies in a tank with clown fish. Most salt water tanks I have seen have very low populations and a molly's propensity to have population explosions might be quite another matter. The salt does not interfere with reproduction either.

Are there any fish that can be both fresh and salt water aside from mollies?

 

[mcqc4]

OK, Before you head out and buy a mollie and toss it in a full on salt water tank, WAIT. Any mollie you buy will be in fresh water. You can put them in a salt water tank but you must first acclimate them to salt. What I've done, once you bring them home put them in a bucket, and then SLOWLY add tank water. You need to make sure the water is about the same temperature, then slowly get them used to salt water. I usually do this by adding small amounts of tank water to the bucket over the course of about 3 hours. Then you can just add the water and the fish all at once back into the tank. I'm no expert by any means, I'm just speaking about what has worked for me.

 

[Zante]

OK, Before you head out and buy a mollie and toss it in a full on salt water tank, WAIT. Any mollie you buy will be in fresh water. You can put them in a salt water tank but you must first acclimate them to salt. What I've done, once you bring them home put them in a bucket, and then SLOWLY add tank water. You need to make sure the water is about the same temperature, then slowly get them used to salt water. I usually do this by adding small amounts of tank water to the bucket over the course of about 3 hours. Then you can just add the water and the fish all at once back into the tank. I'm no expert by any means, I'm just speaking about what has worked for me.

Sure. We're supposed to acclimatise fish when moving them from freshwater to freshwater, I wasn't going to drop one straight into saltwater.

I was planning on doing a 6 to 10 hour acclimatasion, over a day, basically...

For various reasons I have to put the thing on hold for a short while, but in the meantime I'm planning:
How many could I fit in a 30 litre cube + 7 litre sump?

I was thinking only one, but I don't know these fish, so I'll leave it to the experts.
You can see the current tank population in my signature.

 

[OldMan47]

That is a very small space to place any adult molly. 30 litres is only about 8 gallons the way I view things. I have never tried to keep any molly in such a tiny space. I consider a 20 gallon, about 70 litres, as minimum for any common molly adult. Obviously fish can be kept in smaller spaces with enough water changes but nobody really ends up doing all of that work. The fish are the things that suffer when you decide that you can accommodate a fish's need for water changes to support your outlandish desire for large fish in a small place and then fail to follow through. I simply know myself better than that and refuse to stock fish in a manner that would require me to break loose from my habits of minimal maintenance practices.

 

[FishBlast]

If only it were a 95 L reef... O.O That could probably fit some mollies.

 

[Zante]

Mmm... yeah... I thought that would be an issue...

oh well... never mind.

It's something to keep in mind should I upgrade.