Search the net for a 24 V DC, 2.5 amp switching power supply & you should find something at a more reasonable price than from EcoTech. Might have to come from across the ocean, but I'm pretty sure that's where EcoTech gets theirs. Just need to make sure the connector that goes into the controller is the same form factor & polarity. Look at the back of your current power supply & all the info is there. You could even get a larger power supply, 3 amps if you wish, but no need since that's overkill. The controller is what determines the wattage going to the pump itself.
MP20 power supply is less powerful than MP40 I think, so not compatible. While MP20 pump itself is same as 40 it is speed limited by the different controller & therefore has a smaller power supply since it doesn't draw the same amount of wattage.
Last edited by mike31154; 10-20-2012 at 02:34 PM.
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