The manual indicate the bellow,
MASTER Control:Press “Wi-Le” once and enter into Master control when
“Master” indicator lights. Master controller can operate all the functions for
the Slave Control: Press“ Wi-Le” until the “Salve” indicator lights and enter
into Slave mode , where all operation is invalid except adjusting flow rate by
rotate the knob.
Among two or more wave makers, set one as the Master and the others as
Slave. You can achieve the same function and operation for all the pumps by
adjusting the Master controller .
Assuming both pumps using the same generic Jebao controller I believe its possible like its their wavemakers.
Attached is the controller I'm refering to