We are being overrun...

monicasometimes(z5 NY)October 19, 2004

My 6 yo and I decided to start an aquarium. It is a 40 gallon tank and we adopted 2 dalmation mollies and 4 swordtails to reside there. One of the Dalmation mollies died shortly after moving in as did 2 of the swordtails...we were having a problem with our filtration system and the water was nasty. We have since corrected the problem, but are now faced with an over population issue. It seems the one remaining dalmation molly is laying eggs which must be being fertilized by the swordtails as we now have 6 generations of Dalmation/Swordtails in our tank. How many fish can this tank sustain? lol At this point, we have approximately 30..we recently adopted out 12 to a loving home, but don't know anyone to provide homes for the others...it seems there are newbies in there every 6 weeks...The mollies' tummy gets really wide and poof, suddenly 6 weeks later we have a whole new batch of minnows. I'm considering buying another smaller tank to house the 'fertile' one, but wonder if she would be lonely? lol

Thank you for reporting this comment. Undo

mollies lay eggs? please clue me in on this one. i thought all mollies were livebearers. i do agree that swordtails will breed with them. how large are your mollies? are they sailfins?

    Bookmark   October 20, 2004 at 8:25PM
Thank you for reporting this comment. Undo
monicasometimes(z5 NY)

I was under the impression they lay eggs, but after leaving this site, I did a bit of research and yes they are livebearers...that being the case, this little mama has had a hell of a lot of babies in the past 5 months. All of the offspring are silver in color with the black spots. Along with the original 3 adult fish we now have approximately 30 newbies of various sizes...the largest of the offspring are approximately 3/4 inch long...I can't imagine them all surviving in this tank once they reach maturity...is this assumption correct? Should I add an additional tank? I don't want these little characters to start dying before I realize I have an overcrowding issue.
I have been looking for pictures of Mollies to find out whether she is a sailfin...I have been unsuccessful in locating one...what does a sailfin look like? Can you recommend a site where I could identify the type of mollie she is? Thanks

    Bookmark   October 21, 2004 at 8:14AM
Thank you for reporting this comment. Undo

i dn't know of any sites offhand. i think it is the male that displays the sailfin, but she would carry the dna for it. i asked about sailfins because i think they get much larger than swordtails, which would be considered in how many the tank could support. do you have a "mom and pop" pet store around you? thse are my fave. many will accept your extra fish in trade. chain pet stores in my experience will not.
option2- see if your area has freecycle set up www.freecycle.org . if not, you can start one by offering free fish. worst case- food for larger fish. sorry to suggest that, but sometimes necesssary if you can't afford another tank.
the parents will sometimes eat their babies as well. be sure to have plenty of plants as hiding places- real or fake.

    Bookmark   October 23, 2004 at 9:15PM
Thank you for reporting this comment. Undo

you could put all the females together into one tank. males into another. if you keep them all together, you should have many females to one male. that is not what you want because you don't want many babies, but otherwise the female would be harassed continuously.

    Bookmark   October 23, 2004 at 9:19PM
Thank you for reporting this comment. Undo

female livebearers can store viable sperm for months - isolating a female will not necessarily keep her from having babies

    Bookmark   December 4, 2004 at 12:35AM
Thank you for reporting this comment. Undo

oops, i forgot about that part. thanks for the corrrection!

    Bookmark   December 5, 2004 at 7:39PM
Thank you for reporting this comment. Undo

mollies are livebearers

    Bookmark   February 1, 2006 at 11:33AM
Thank you for reporting this comment. Undo

im having the same prob wth guppies. and my lttl bros decided to drop a large rock in the bottom of my spare tank, so i cnt just seperate them.....i can live with strainging out males for 6 months...if i had the tank...o well, im rambling....

    Bookmark   July 29, 2006 at 2:23AM
Thank you for reporting this comment. Undo

stores recomend 1 on inch fish for every gallon though i think for forty gallons you can definatly keep up to 45-50 of those fish. when the tank gets overpopulated the fish may start dieing off. i had about 40 fish in a twenty gallon tank and upon going away for app. 4 days i lost all but two of the guppies and 4 platties and two danios. if they start dieng off i would reccomend to change from 25 - 50 % of the water and hope for the best. i bred these fish to feed my catfish once in a while so i somewhat controled the population that way.and a freind of mine resorted to not feeding them and that method was far more succseful than mine

    Bookmark   October 13, 2006 at 8:40PM
Sign Up to comment
More Discussions
Betta fish and heaters
Hi, I just bought a little betta fish. I appsolutly...
Anyone use crushed granite for gravel ??
I was thinking of using a product that would normally...
Trading guppies for aquarium plants
I have some very nice yellow guppies that are young...
Interested in getting into aquaponics ...
The common freshwater yabby (Cherax destructor) is...
Newbie Betta owner here.
I just put together my first betta tank. It's 2.5 gallons,...
Biinaboo, Zone 10, Naples, Gulf Coast
Sponsored Products
NOVA Lamps Escalier 61 in. Floor Lamp 11815
Home Depot
Round Outdoor Pouf
Home Decorators Collection
Ariel 5 Blade Ceiling Fan by Savoy House
$778.00 | Lumens
Rose Style Shower Head - Rainfall Effect Easy Clean Chrome Overhead
Hudson Reed
Chandra Strata STR-1124 5' x 7'6" Blue Rug
$583.00 | PlushRugs
Sweet Cherry Pendant in White
$139.99 | Dot & Bo
Heirloom Polished Nickel One-Light 5.5-Foot Cord Pendant with Medium Flared Meta
$386.00 | Bellacor
Pre-owned Birmingham Silver Co. Punch Bowl Set
$650.00 | Chairish
© 2015 Houzz Inc. Houzz® The new way to design your home™