If it's only been a few days, just give them time. They're still adjusting to their new location. Yes, more flow and light will help them come out but I wouldn't be worried unless they're starting to melt away. I've had zoos stay closed for a month for no other reason that to drive me nuts.
Take a close look at them just to make sure there aren't nudibranchs or other pests causing them to close up. Other Han hat just wait, give them time and don't move them around too much. If they start to look pretty worse for wear, vitamin c dozing can help but this is another beast all together and should be approached carefully ( I don't recommend it until you REALLY know what you're doing).
Get ZoaElite on this. He'll have an answer for you.
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