Toadstool not opening up

[IE Reefer]

Hey everyone,
I've been having this green toadstool for two weeks, and I've never seen its polyps fully extend. I've placed it on a ledge in the middle of my tank and on the floor, and the most I've seen it extend is on the sand bed.

Here is one of its brothers (I assume) that was in its previous owner's tank.

And here it is now, in my tank...

 

[monkeyCmonkeyDo]

Check salinity. Temp. Alk.
Ur leather prob just needs time. How longs it been in ur tank? Looks like its trying which is a good sign.
D

 

[IE Reefer]

Check salinity. Temp. Alk.
Ur leather prob just needs time. How longs it been in ur tank? Looks like its trying which is a good sign.
D

I don't own an Alk tester, but I am working on getting one... temp is 78°F, salinity is 1.022ppm (I am in the process of mixing saltwater). The leather has been in my tank for 2 weeks, at first I thought that it was in the process of shedding but throughout the span of those two weeks I have never seen anything come off of it.

 

[monkeyCmonkeyDo]

Bump ur salinity to be correct. Make sure temp is 77-78. Should polyp out more after that. Give it a good 3 days in the higher salinity.
D

 

[monkeyCmonkeyDo]

Yes occasionally after its done acclimating it will stay retracted for several days well it sheds its skin.
Prob be a month from now or next week depending on how it does.
U got this!
D

 

[IE Reefer]

Yes occasionally after its done acclimating it will stay retracted for several days well it sheds its skin.
Prob be a month from now or next week depending on how it does.
U got this!
D

That sounds like good news; thank you for your reply!