Refugium isn't needed if you have a big enough tank they will find places to hide

The pods must be way too small as I don't see any.

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Look in the caves, nooks and crannies and the bottom of rocks with a flashlight both during the day and at night their eyes will reflect the light and yes they are small ranging from micro sized to about 1-2 millimetres long

I only ever see them on the glass at night if I shine a light in the tank.

Thanks for the tip! I'll try that.

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