Thank you for reply.
Laing DCC-1plus T 12V 18W. The pcb was broken, i replaced it with this one :
http://www.diyinhk.com/shop/ddc-pump/41-…red-mcp355.html
Now the pump is PWM and it seems to work good.
The controller of aquasuite is set to PWM.
I have created a new controller for FAN1 with preset value at 40%, so the pump run at 12V with 40% PWM.
Max pump speed at 100% PWM - 4500rpm
Pump speed at 40% PWM - 750rpm