molly fry rapidly dying!!!! help!!!

[sami the cichlid]

Well, i bought 3 pregnant females on the weekend, 2 gave birth on sunday. The black molly had only 8 babies in the morn and the multicolured molly had 20.
I put them in a seperate 2 gallon tank with no filter. on tue and wed 3 babies died altogether (only the multicoloured mothers babies) so i added a filter (fluval U1).
The next day (2day) i found 4 dead babies (all multicoloured mother again) so i thought the filter pressure/current was too high fo a small tank, so i moved them into a larger tank. During the move 12 multicoloured babies died!
i think it was the stress of the move. oddly, NO black molly fry have died!!!!! and i also have another prego molly and dont want a repeat of the last 4 days.
Any advice welcome

[Blueiz]

Was there a heater on the tank as well? Have you tested the ammonia levels in the 2 g tank?

[sami the cichlid]

yes there is and was a heater in every tank theyve been in, as for the test i might do it tommorow if i can find my kit! i have been doing water changes daily tho. i think another1 died! Im thinking tho the shop said they would drop in a week but i knew the black molly would drop the next day, whereas the other molly i put in a net for safety as she was pretty big. could i have made her give birth prematurely, thus weakening the babies?????

[Blueiz]

I think that you should round that test kit up now if at all possible and test the water

[sami the cichlid]

hi, ill test the water tonite with wht testsb i got....!
4 more dead this morning, including black molly fy. ive only got 9 out of the 28 left and i think so more or all of the 9 will die
sorry cant test now cuz its 7:30 am in wales and i got school, and assessments......i was hopin they would give birth for half term!

[sami the cichlid]

ph = 7.2 - 7.6
Nitrates= 5.0 - 10ppm
Nitrites= 0ppm
Ammonia= 0ppm

well...firstly, 8 more dead 2day, 1 left and nemo (its name!) has gone into the main tank in a breeder net for safety. Nitrates r high but i do a water change every day and added a filter 2 days ago! but, as u no 3 died before the filter but when it was added they started dying in huge numbers. need help! v confused! i've got a prego fish waiting and i want her babies alive!!!!

[mfdrookie516]

nitrate isnt high at all... did you acclimate the fry when you moved them? are the water parameters close to the same in both tanks?

[sami the cichlid]

yes, i did i floated them in cups for each tank they were in. im considering spliting the main tank for the next fry, only nemo left and i cant find him in his net! i hope i will. I dont no why they started dying in large nubers (4+) a day when the filter was added!!!