Hello, looking at getting an urchin or two to help with some GHA. I have calcium reactor media as my substrate, so basically large pieces of crushed coral, will an urchin be able to travel over this? Or do they need sand
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Theyre not picky on substrate as they are with high nitrates and lack of food sourceHello, looking at getting an urchin or two to help with some GHA. I have calcium reactor media as my substrate, so basically large pieces of crushed coral, will an urchin be able to travel over this? Or do they need sand