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Getting all the things lined up for my setup of the Oceanic 29 Biocube. Now I've been reefing for quite sometime but I've always placed my power heads on the glass with magnet placed on the outside of the tank. Question is I want to place my power heads on the back wall of the biocube, will I be able to place the connecting magnet inside the water without any adverse side effects on the tanks water? It will be a Koralia type magnet, all help is appreciated thank you! If I can't put the magnet in the water what would be another solution to place the powerhead on the back wall?