A number of you might have purchased abroad certain wavemaker pump motor pumps such as Hydor Koralia, Tunze Wavemakers, and the like from countries such as Singapore or Hong Kong.
In most likelihood, it will run but not operate properly once you plug them into the local Philippines 220VAC / 60 Hz power mains.
The key dependency revolves around the need to make a 50Hz rated motor to run under 60Hz frequency.
Don't despair. There is a workable work-around.
A <-> B <-> C <-> D
where:
A = 220VAC/60Hz mains supply
[your local Meralco outlets]
B = 220VAC to 12VDC converter (3-5Amps)
[regulated is best; this usually costs anywhere from php 600 up]
C = 12VDC to 220VAC 50/60Hz inverter (150watts up rated)
[CDRKing sells them at Php 750]
D = 220VAC/50Hz motor load
[Tunze or Koralia's purchased from HK or Singapore or equivalent]
Happy Reefing!
-JackRyan