IS it possible they said 150 watts? AT 150 AMP, the pump would probably be the size of your car.
Check every piece of hardware you have and look for the following info: wattage (watt) OR current (amp). You will find the proper details stamped somewhere on them. If not, check the manuals that came with them, or check the manufacturers' web site to get the proper details.
What you should be careful about tho, is how much amps you put on your circuits. A 15 amps circuit should not be loaded more than 12 amp, for "elbow room". When motors and pumps start, they usually draw more current then stabalize at their rating.
With anything electrical, ALWAYS ensure that whatever you connect is properly grounded. If not, you are walking on thin ice and puting your life, and those you love, at risk.
Consult electricians when unsure of is going on with your electrical circuits. If fuse/breaker are going off when something starts, the circuit is overloaded. Replacing the fuse/breaker with a higher one is NOT the solution, it is more involved than that. New wires and maybe outlets have to be installed.
and be safe