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Old 10-22-2003, 10:41 PM   #1
al437la
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Sailfin Molly from Fresh to Saltwater ?


I do have several saltwater tank (fish and coral) as well as one freshwater tank. I recently setup a 55 gallon saltwater quarantine tank with aragonite, an emperor 400, etc.
Someone suggested I could place the sailfin molly from the freshwater in the saltwater quarantine tank to maintain a good bio-burden in case I need to use the quarantine tank.

Question: Is this a reasonable approach?

Question: what is the best way of adjust the molly from fresh to saltwater ? Time, gradual, etc

Thanks

Hans
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Old 10-22-2003, 11:17 PM   #2
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i've heard this before too when i first set up my tank. but to me it sounds cruel.

i have what i call an acclimation tank, and i suppose it could also be considered a quarantine or hospital tank. it's basically just a small 10g tank, completley independant of the main tank and plumbing. it's self sufficient with its own powerhead and light.

what i do is drain it. when i need to use it, i drain some water from the display to the acclimation tank. and fill it up. then i float my new bags in it. and do my acclimation procedure for slowly mixing in tank water, with the bag water. eventually i dump the bags into the acclimation tank. once the fish are acclimated, then i net them and put into the display. then i drain the acclimation tank. this removes 10 gallons of water from the display/sump.. then i add 10 gallons of new water to it. (never mix in lfs water to your tank, as it may contain parasites, copper, etc...)

this does two things, allows me to aclimate fish longer, without keeping them in the bags. and also forces me into a 10 gallon water change on a more frequent basis.

anyway, that's the same way i would do it for aquarantine. drain water from the display into it, then add new water to the display. now you have your quarantine tank filled. you could keep the filter media from your emporer in your main tank, to maintain the bacteria colonies.


you know what, sorry, i jsut ntoiced that your quarantine tank is a 55g. this might not be a viable option for you!!

perhaps you could jsut add a few pieces of live rock ,and make the tank home to a small damsel or some other hardy fish. or jsut add some food to it on a regular basis, or a shrimp once a week, etc... this will keep the biological filter active.

hope some of that helps.

and WELCOME TO TRT!!!
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Old 10-23-2003, 01:00 AM   #3
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al437la


A couple years ago when I first started getting into saltwater, I converted several black Lyertail Mollies to full saltwater. I started them in a 20gal with regular water. I used a glass that was about 16 oz, & I would take a glass full out of the molly tank, then replace it with a glass of saltwater from my main tank. I did this every day for about a month until the tank was up to 1.023 I then added them to the main tank. I had about a dozen of them when I tore my tank down to move. I can still picture the look on the LFS owner when I took the fish to him & he seen the Mollies in the same water as two tomato clowns.
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Old 10-23-2003, 07:32 AM   #4
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there are sevral fish out there that like brakish water. but unless the mollies are that type ( do not think so or at least only a few types like it if i remember right.) then i would not try to use them. if you just want to keep the tank going why not drop in a few damsels or a group of chromis. yes the mollie is a lot cheaper but getting use to SW would not be worth the time and money.
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Old 10-23-2003, 08:13 AM   #5
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My wife acclimated two mollies to saltwater. Actually it was suppose to be a brackish water tank, however she was listening to me and my reef tank specs and got confused. when I realized what she had done, well the birth of her reef tank followed. The mollies lived for almost a year and they ate some of the hair algae. This was before she learned the wisdom of RO/DI water (I bought my own from the fish store but she didn't want to take the time and trouble)

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Old 10-23-2003, 08:27 AM   #6
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Jay, think freshwater fish would actually be happy in salt? I'd think after a while they would eventually die off! Like telling me, that form now on I have to breath in seawater myself!

Last edited by BuckWheat; 10-23-2003 at 09:21 AM..
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Old 10-23-2003, 09:12 AM   #7
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that is neat i almost want to try it, but my salt water marine only has a lion so peace out molly.
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Old 10-23-2003, 10:04 AM   #8
al437la
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Thanks guys for sharing some great thoughts. Particularly "thefatman"'s response. This is a very pragmatic approach.
Even though I didn't mention this in the original mail, the need for a 55 gallon quaratine tank arose a while ago when I experienced a bad case of ich in the display tank. This forced me to take out out all the fish and treat them seperately in a bare 55 gallon.
In the process I lost several fish since the bio-load in the bare 55 gallon was too heavy.
So want to be prepared just in case. Not to mention the satisfaction that comes with setting up another tank.

I probably will follow the recommendations and put some damsel or chromis in the tank even though it is tempting to widthness motter nature's ability to adopt to various environments.

As the 55 gallon quaratine tank has just conventional tubes, are there corals that could be well maintained under these less light intense conditions ?

Thnaks again
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Old 10-23-2003, 10:57 AM   #9
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I successfully breed mollies in a 40 gallon tank. i have about 14 of them, 2 being male. Ive read that the mollies breed and actually live better in saltwater. I gave it a shot, and I now have babies everywhere. I acclimated in about 2 hours, and out of 15, i only had 1 casualty. Thats my experience.
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Old 10-23-2003, 11:44 AM   #10
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al437la


From what I was told by a friend of mine thatís been into saltwater fish for over twenty years! That the black mollies were originally a brackish water fish converted to freshwater! He told me that many years ago they raised the mollies in full SW so that they could use the fry to feed their tanks.

I also noticed that mollies in brackish or full SW donít tend to get ich & fungus as much as in FW
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Old 10-23-2003, 11:49 AM   #11
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Point worth mentioning, mollies do seem to adjust rather easily, Now I know!
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Old 10-23-2003, 12:38 PM   #12
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Mollies by nature ARE brackish water fish. They can be SLOWLY acclimated to saltwater by dripping the SW to their FW like overnight. The only thing is, if you have a pair, they will spawn like MAD after acclimating!!!!! One of my LFS has a whole tank of black mollies in SW for sale. Mostley for people who are cycling their tank.
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Old 10-23-2003, 01:00 PM   #13
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I breed my mollies so that i can feed my fish. I use them as feeders. Cost effective in the long run i figure. Would also be great to cycle a tank with. A lot cheaper than damsels, and pretty hardy too.
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Old 10-23-2003, 01:54 PM   #14
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Re: al437la


Quote:
Originally posted by dwall174
From what I was told by a friend of mine thatís been into saltwater fish for over twenty years! That the black mollies were originally a brackish water fish converted to freshwater! He told me that many years ago they raised the mollies in full SW so that they could use the fry to feed their tanks.

I also noticed that mollies in brackish or full SW donít tend to get ich & fungus as much as in FW
bingo, we have a winner. mollies are a brackish fish. back in the old days this is what i used to tell people to cycle thier tanks with. black mollies seem to be the best for this purpose. they are hardy, slow, eat algae, and are not aggressive. (of course i have learned that it is better to just use the LR). i would not suggest anykind of damsel for a quarantine tank. they are to aggressive, they would add more stress to the poor fish in quarantine. if you need to have the tank setup all the time, then i really suggest the mollies. do not keep anything else in the tank, this includes substrate, LR anything. this is a quarantine tank. the less variables in there the better. what Jay does is a great idea if the tank were smaller, but since it is so large it prolly should stay up the entire time. mollies will be glad to eat flake you drop in, or they will just eat the algae that will grow on the sides of the glass. they are slow enough that when you need to use the tank you can catch them and move the out of there so they are subjected to the treatment. you can easily place them in your sump or refugium for a short time, no harm. you should wait a week after removing the treated fish to reintroduce the molly.

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