The weird stuff in my tank

[avilamillar]

Be very careful when removing it. Any lose strands can find a new home anywhere in your tank and then you will be fighting the bryopsis to a losing batttle.

The peroxide dip will work for any rocks that might be infected, but it is an indiscriminate solution. It will bleach everything.

The first pic? Could that be hydroids in an early stage?

I'll be doing a water change tomorrow, so I'll scrape the bryopsis while taking the water out of my tank so that any lose strands would go down the drain.

I did look at some hydrioid pics a few days ago. They look a lot like hydroids but after a few days they swim around like jellyfish.