Recently had a catastrophic power failure due to a faulty waterfall pump, which also damaged the pump to the filter (Evolution Aqua Nexus) and the uv unit! I have managed to keep the air pump which agitates the filter media in the outer chamber going, the inner chamber is empty. I have also rigged up a fountain and the new waterfall pump to help provide oxygen for the fish. The new pump from pond to filter will be fitted on Tuesday 6th July. My question is, will the filter media in the inner chamber still be safe to use after being 'dry' for several days? Will it need replacing? I'd be grateful for any advice!