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I own a mag model 2 and they are right on the money with gph however fyi they have screws that rust( I was told by the manu on the phone that the rust is so minimal that it matter but it raised cation for me..). Also mines set up 2 feet below my tank and works perfectly with my overflow. You can always put on a check valve to slow it up in case you wanna get a bit of extra power.

 

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*doesnt matter! my bad

 

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Thats how a lot of the aqarium business is

 

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mags dont really make a noise unless air bubbles get in them atleast thats the way ive seen it their pretty silent

 

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Fyi koralia are overrated in both gph and price low you should try mp40s if i had a tank your size i def would

 

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How is it overated in GPH? Didn't a recent study show that its inline with what is advertised?

Ive ran several of the smaller pumps from the nano-750 i a few different ways and the flow couldn't compare to when I matched it with cheap aqueons. I've also seen the difference in 1650gph flow which was 2 of ea in a 130g and i really thought the koralia was really being out done by a by far cheaper product but its just my opinion..