well if you want to try this you may have better luck.
get your larva tank going with parents water on day 7 ,put in your rotifiers. tint the water green,set temp.on day 8 put your eggs in tank .black out tank completely.
keep sides black for 7 days,first 3 days use dim lighting ,leave lighting on day and night.
keep adding algae for 14 days
on day 2 starting lowering the salinity to 1.020
with this method im basically making a culture in the larva tank and not having to add rotifiers and wondering if there getting enough food
vic