Coral Update 
Ultra RAH 
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Wall penetration / bulkhead fitting
Useful Accessories for Drilling an Aquarium
Bulkhead fittings and wall penetrations are essential accessories for installing or upgrading a freshwater or marine aquarium. Drilling the bottom of the aquarium is advantageous as it allows for space-saving inside the tank along with a superb visual effect. Bulkhead fittings and wall penetrations are reliable, easy to install, and completely watertight. They are compatible with rigid pipes and PVC valves. Ideal for an external sump system and an overflow aquarium.
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