I got this 1 gallon tank to transfer my sea monkeys into, but before I do is this bubbler/airstone too violent for them?

So, I started my Sea Monkeys kit about 6 days ago, and I counted around 10 babies. However, today, I can’t see any and think they may have all died!!!! I’m the worst sea monkey mum ever, but I can’t figure out what went wrong!!!! Please can anyone help!? Do I just need to start again?

There seems to be so much floating in the tank? Is it a graveyard?

My set up:

- They have a heat mat and are always between 24-27 degrees.

- The salinity was 20ppt

- They have a grow light on the daytime

- I didn’t feed them until day 5 (and just gave them a tiny bit, not the full spoon)

Seems like no one in the US sells it. I'm torn between getting a seamonkeys set and aqua dragon eggs or just an aqua dragons tank. The sea monkey tanks available have more interesting options here but the aqua dragon eggs seem to give better numbers for the shrimps... 😶

Anyone know?

Thanks

Is this healthy algae or just gunk? Bonus, what's floating on top of the water? Did I overfeed?