is it possible to controll pwm of 220v ac aqaurium pump with arduino ?
and what kind of circuit or a driver motor ?
this is the pump that i mean (sunsun JTP 2800 pump)
I would try using an SSR.
Depends what you want to control. It isn't clear that this does use an AC motor, it is more likely to be a DC motor with an internal PWM controller running off rectified AC mains with a little switched-mode power supply. Just conceivable that it's an induction motor with an internal VFD. Either way, with a mains connection it would be hazardous to connect it to an external Arduino. You might use either a solid-state relay as Railroader suggested or a relay just to switch the mains on and off, but not speed control.
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