Help!

I have something on my rocks. Sorry I can't take any pic but I will describe it the best I can.

They look like anemoies several of them on the rocks and a couple are on the glass. They are white and if I touch them they close up into the rock like an anemonie.
My tank is empty right now I'm getting it ready to go reef. My Nitrates are thru the roof over 200. (I stired a 3inch sand bed that had the waste of a trigger and grouper for over 2years).
So I plan to remove the sand I know I may have another cycle. But all other levels are fine.

Am- 0
Salenty - 1.024
Ph- 8.0
nitrite-0
nitrate- 200

Its a 55-gallon 30lbs lr 3 inch ls
wet dry with bio balls


Do anyone have any idea what this is on my rocks and how to get rid of it if it is bad.

 

Sounds like aptasias or some call them glass or rock anemones not a good to have then in the main tank great filters in a refugium though

 

Do it look like either of these anemones?

Majano anemone:


Aiptasia anemone:

 

They look more like OverThinker's avatar on this forum link white egg looking balls on lr.