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I want to collect Barnacles from my house and would like to keep them alive in my tank. Do they need light?like a coral or more like a feather duster? Could I feed them zooplanton?
They are filter feeders, they filter the water with their feathery little grabber things (legs). So if you add a recommended amount of phytoplankton like DT's phyto or kents phyto they will be happy little guys.