Nick Nice to see your back around!
My Golden Rams use to spawn as yours have in a hollow,then they would move them after they hatch.It took mine 4 go's toget fry to hatch then i lost the female

.....i think consecutive breeding atempts tired her out to much so feed them loads of nice things like frozen bloodworm,whiteworm,microworm perhap's if i had done this i would have kept her alive.
The babys are micro in size Nick so Baby Brine shrimp would proobably be well worth looking into.