Yeah, I added one a few weeks ago. Shows up in random spots every couple of days. Still not exactly sure what it does. Doesn't seem to be churning up the sand bed like I'd hoped.
I have 2 tiger tail cucumber in my tank about half year ... they normally hide in between liverock and sandbed ... the head at one side and tail at another side of the same LR so they transfer the sand from one side to another side until the LR slanted and going to collapse ... I need to manually transfer the sand back always ... planning to take out from tank later ...
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