Penguin Powerhead Model 550
This pump runs quiet. I am happy with this pump. I started a new 20 Long tank, (30 X 12) and it seems to be just right with the undergravel filter. I also have the other Penquin models and they are quiet running and have been running for years.
March 19, 2014
reliable long lasting product
I have used these powerheads for some time. Couple it with the sponge filter and they make a good circulating jet for a reef tank; exactly where you need that extra circulation. The sponge makes a good home for various amphipods and copepods
February 5, 2014
Dependable Power Head
I've been using the Penguin 550 Powerheads for about 17 years. I don't recall one ever failing me but I don't keep up with cleaning the tank very well and the top of the head will get a hard scale after a couple years and I'll replace the heads with clean ones when I do a thorough cleaning of the tank. I have used other brands of powerhead and some have failed, and the output is not as flexible as the 550.
October 9, 2013
The Penguin Powerhead Model 550 works just great. Quiet and powerfull. I bought two for a 90 gallon fresh water. I use them in conjunction with the air stones that come with the under-gravel filter. Plenty of suction. Both powerheads are on the outside and the air stones are on the inside of the filter pattern.
October 4, 2013