Elizabethae with eggs... Video

[Ade205]

Hi all.

My Elizabethae have spawned for the fourth time, this time both females at the same time. One of the new spawns has already failed as have the previous spawns and I suspect my water is the issue. Out the tap my water is 7.8, tds is 440ppm! First spawned ocured at a tds of 120ppm. I've been steadily lowering it and today it's at 70ppm.
This is a vid of surviving spawn at 3 days...

One member on here, 'I'm a Doughball', said had best spawns with ph5 and 20ppm tds but had had fry at 50ppm...just wondering If anyone with experience of Lizes thinks I hv any chance with this spawn and would like to hear what water parameters they had success with?

Thanks, Ade.