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Be careful disturbing a DSB. Many a tank crash has happened because of it.
The reason your N03 and P04 is low is because of the DSB. It's a denitrator. Good thing.
Course sand beds can trap detritus and give the bristle worms ample food. Their numbers will self regulate depending on available food. So mass deaths of them should never happen. They won't toxify the water column when they die as flatworms may.
The reason your N03 and P04 is low is because of the DSB. It's a denitrator. Good thing.
Course sand beds can trap detritus and give the bristle worms ample food. Their numbers will self regulate depending on available food. So mass deaths of them should never happen. They won't toxify the water column when they die as flatworms may.