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green star polyps not opening

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using an additive nutrafin cycle it says the tank will be ready in 3 days

The stuff is crap , does not work.

No marine is going to be ready in 3 days,

as for the star polyps they need lots of water movement to open.

if you have seen the white stars then they are probably still alive sounds like they dont like something in your tank for the polyps not to extend they are very hardy corals so id check all your parameters as it does sound like your tank isnt properly cycled

Mine took 2 or 3 days to open fully.

They love light and lots of flow.

Some star polyps have white centers and long green 'petals'. Some just have the long green petals.

Mine closed up on one side just recently for about 3 or 4 days. I moved them higher in the tank and away from my other corals (just in case they were having a toxic war game) and they opened up fully the next day.

I was at Wonderworld last week and all their star polyps were open and looked just fine :)

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