Help.. wrigglers keep dying

[Gamer77]

Ok i have 1 pair that spawn almost every week..they got 90 % hatch rate but the wrigglers born in day 3 ..they star moving the frys to another place in the cone and all fine to day 5..they start falling of the cone..the parents pick some but left some unnatended in the floor..at day 6 all wrigglers die ..the parents dont even eat them..
The water parameters are ok..i usi rodi water for the first day of spawn and start to adding tap aged water in day 2 to level up ppm ..any help will be apreciate..

[Sturiosoma]

I would love to be able to help you out here the only thing I would ask would be a little more info on your water parameters

Jeanne

[Gamer77]

Water is ok all in the apropiate numbers..ph 6.8..ppm at 140 after hatching..30 % water changes every day temp 84..i dont know why they keep diying before freeswiming..they lay eggs today again