Swordtail fry not growing help!!!
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Swordtail fry not growing help!!!

This is a discussion on Swordtail fry not growing help!!! within the Livebearers forums, part of the Freshwater and Tropical Fish category; --> Hi, I'm to this site and am sooo glad I found it. Anyway, I have a 120 gallon tank with swordtails mollies and tetras,I ...

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Swordtail fry not growing help!!!
Old 07-03-2010, 07:56 PM   #1
 
Unhappy Swordtail fry not growing help!!!

Hi, I'm to this site and am sooo glad I found it. Anyway, I have a 120 gallon tank with swordtails mollies and tetras,I also have a 20 gallon tank with swordtail fry in it, and have been there for about a month and a half.They are not growing any bigger and I don't know how fast they grow or if I'm doing something wrong.I feed them "first bites" and crushed tetra flake food, my molly fry seem to grow ok but the swordtails are not growing.I have three molly fry and four swordtail fry in the tank.Any answers?Also what is the ideal PH level for the swordtails in both tanks?
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Old 07-03-2010, 09:27 PM   #2
 
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Some fish grow faster than others. Are you doing several water changes each week?
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Old 07-03-2010, 09:52 PM   #3
 
No I am very new at this and thought that water changes would stress them out or something.
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Old 07-03-2010, 10:24 PM   #4
 
Also where I live the water is so bad I dare not put it in my mouth let alone my tank!
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Old 07-04-2010, 07:48 PM   #5
 
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Quote:
Originally Posted by gilly67 View Post
Also where I live the water is so bad I dare not put it in my mouth let alone my tank!
How ironic... "Location: Clearwater Florida" is that a place or is that a joke? :p

Anyways, what kind of water do you drink or use to do water changes normally, then?

Baby fish do appreciate at LEAST weekly water changes. Every day is the BEST, even 2 times a day. But, the benefits of doing 2 water changes per day is not worth the minimal increased growth probably. I'd say maybe change the water 2-3 times a week and that should be good.

It also depends on how much fry you have. Frequent water changes are necessary so you can feed your fry OFTEN. I was reading on raising livebearer fry last night and it said 5 times a day was the best. So with this much feeding you HAVE to do lots of water changes to keep water quality good!

I am pretty sure that fish food is good for fry. I use it and it's specially formulated for babies so I assume it's good.... Haven't used it long enough lately to notice any effects.

Lastly, a large tank will help. 20g should be good in my opinion. You can move them to your 120 when they get about 1 inch and raise them in there? I have read that fry like to be kept in smaller tanks when just born. It makes them more secure. Then they can be moved to larger grow out tanks after they grow a little bit.

Heres the summary : Clean water (do water changes every few days and add plants if you can), Food 5 times a day (less is fine but the more the better), a large enough space for them to grow out in.

I am having problems with my fry not growing large enough and their growth being stunted. Recently I've been feeding my fish more often and I'm noticing better growth.
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Old 07-05-2010, 02:36 AM   #6
 
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Have kept livebearer's such as mollies,platy's and swordtails and most agree that these fish do best in hard alkaline water with ph levels between 7.4 and 8.0 with 10 to 15 dgh.
Swordtails also prefer cooler water than guppies and mollies and temp around 75 degrees F would suit the Swordtails as well as platy's.
These fish do appreciate a diet which contains fair amount of vegetable matter and not too much meaty foods which can cause constipation. In the wild,,they are largely Herbivores.
Would look for foods such as spirulina flake,Omega One veggie flakes,and or some dried marine algae or live java moss ,which they will enjoy.
As suggested,fry will benefit from several SMALL feedings per day and water changes may need to be more frequent to keep nitrate levels which these fish do not like in high numbers low. Would aim for Nitrates around 20 ppm.
Healthy fry at around five weeks,should be large enough to place with adult fish without fear of adults eating the young fish ,but if enough live floating plants, or artificial plants ,are in the aquarium,, then fry can survive in respectable numbers and don't need to be moved.Hope some of this helps
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Old 07-05-2010, 04:23 AM   #7
 
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I also forgot to mention, I read somewhere that guppies (somewhat close to sword tails...) grow to be double the size when kept virgin. (sure this is an exaggeration)

"Limit the tank population to 20. Ten is better. Crowding stunts their growth. Don’t mix big ones with the little ones regardless of sex. The larger ones give off a so-called “growth-inhibiting hormone” that slows the competition. (Many think this is merely their waste products.) " - http://aqualandpetsplus.com/Livebearer,%20Guppies.htm

Not sure how correct that is and it may apply to sword tails. But anyways, you'd think female fish would grow larger if kept virgins. So that might be one thing. Don't mix them with males.

Same site but I found it informative, here's the section on swordtails : http://aqualandpetsplus.com/livebearer,%20swords.htm
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Old 07-05-2010, 05:30 PM   #8
 
Thanks for all the information. I did a water change today and will get better food for then tomorrow.I did ok with "first bites" with my angels when I bred them, just new to swordtail breeding. I will also turn the temp down slowly and see if that helps.they have been the same size for about 4 weeks or longer but the molly fry are growing good.I did drop the PH level when I did the water change and did a slow drip to replace the water so as not to PH burn them. Again thank you all
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Old 07-05-2010, 05:32 PM   #9
 
Thanks for all the information. I did a water change today and will get better food for then tomorrow.I did ok with "first bites" with my angels when I bred them, just new to swordtail breeding. I will also turn the temp down slowly and see if that helps.they have been the same size for about 4 weeks or longer but the molly fry are growing good.I did drop the PH level when I did the water change and did a slow drip to replace the water so as not to PH burn them. Again thank you all P.S.
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Old 07-05-2010, 05:38 PM   #10
 
P.S. the beach water is clear but the tap water is not!! I use store bought drinking water for both which gets expensive for the 120 but is fine for the20 gallon
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