Fry Not Growing

[First_Fish]

Last month our Molly gave birth. We managed to save 2 fry however one of them doesn't seem to be growing. Has anyone got any ideas why? The other is now twice the size and looks great.

 

[alysonpeaches]

Last month our Molly gave birth. We managed to save 2 fry however one of them doesn't seem to be growing. Has anyone got any ideas why? The other is now twice the size and looks great.

I have also observed poor growth in mollie fry. Perhaps the one isnt thriving is a runt and would normally have been culled by a professional breeder. However, it is obviously important to you, and I personally could never cull fry. I can only suggest extra feeds, perhaps with some frozen daphnia, artemia and bloodworm. Alternatively, buy some high protein food. If its over a month old its probably too late to give it powdered egg yolk. Do you have sources of algae/vegetables/plants for the fish to graze on? Recently, I really wanted to keep my mollie fry and the two I have had for a few months now I saved in a fry net for about 3 weeks and gave extra feeds.

Also, consider gender differences, males are much smaller than females.

What is your pH? is your water hard?

 

[First_Fish]

pH is around 7.5. The bigger fry is a female, the other is hard to tell. Could be a male

 

[Fish are AWE]

What foods are you feeding them and what tank size?

 

[First_Fish]

Tank size 64l. Feed them different foods, small frozen, flake (crushed) pellet (crushed)

 

[OldMan47]

For best growth, feed frequently in very small amounts and do plenty of water changes. I have seen it said that when you walk past from left to right, feed them and when you walk past right to left you do a water change. Of course this is hyperbole, but frequent feeding and clean water means rapid growth.