i have mine in the middle of the tank in moderately random flow under my 150w sunpod in my 24g. they are open all day long and night. i also spot feed them every other day with some mysis. good luck with them. they are gorgeous when they are open. they are hardy so they may like it anywhere. a lot of people have them on the sandbed. it will let you know if it's happy. hope this helps.
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Nick Kohrn
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