save

Hello, am new to the saltwater hobby, my tank have been cycling for 12 days today, and my water parameters are ammonia: 0,2 ppm, NO2: 0,5 ppm and NO3: 10 ppm. Is it save to put in some soft corals? sorry if it is a stupid question

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When doing maintenance (water change/clean sandbed) I always notice tons of pods in the dirty water. I always have fished out the amphipods before ditching the water, but I'd like to be able to save the copepods as well. Anyone have any tips/strategies for accomplishing this?