I used a tool as that's what I've seen in most tutorials. Yeah I imagine it must have been a defect, but I will message co2art to see what they think.Was the nut hand tightened or did you use a tool? Should only be hand tightened. Having said that, I wouldn’t expect a nut to split in half that way, so I’d suspect material defect or that it was damaged in some way.
Thank you!What a beautiful aquarium. Your hard work has really paid off.
Will do that!You can contact them via email: support@co2art.co.uk