Question about urchins and substrate

reef’r

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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
 

N11morales

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They should be perfectly fine. They may try to pick some of ur substrate up though to "hide themselves" lol. Love to watch urchins in the tank. Such a great addition to any tank imo.
 

NonstopSoda

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Urchins will be fine in any substrate they just might pick up some of the bigger pieces of the crushed coral as a lil hat!
 

vetteguy53081

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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
Theyre not picky on substrate as they are with high nitrates and lack of food source
 

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