Electricity advice need for aptasia zapper

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I'm in the process of building my own aptasia zapper and a problem I've ran into is finding the right transformer, I can only get a 12v 1000ma transformer instead Of the needed 12v 500ma so I guess my question would be would the 12v 1000ma transformer still be safe to use? Thanks hope you guys can help!

 

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Anyone?

 

[Reef UP]

Look at what I did haha and it works