Urchin not active

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Hi i need some advice i have a flower urchin in my tank he was very active for months but for the last 2 or so days he is very inactive not moving mush all his spines is stil intact not looking bad. My nitrate 1ppm nitrite 0 amonia 0 salinity 1026 temp 26. Any ideas.

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viper357

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Your tank looks very new, possibly not enough food for it, such as algae and coralline. Have you been feeding it?
 

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