I love these ... simply put them on the intake tubes of your undergravel filter and you'll get tons of water flow and excellent filtration. Nice for any tank, great for larger tanks. I highly recommend these.

Pros: Lots of water flow!

Cons: Non found.

This is the best airator for any aquarium. It is easy to install, adjust and keep clean.

Pros: Best Airator

Cons: none

I got one in most of my tanks and and i love it. turns regular gravel into another filter. I got all mine with the air hose and brings a lot of oxygen into the water. Plus my fish loves to get into the current and get a little work out.

Pros: turns the gravel into a filter

Cons: needs to be cleaned every few months

I got one of these a while back for an under gravel filtraton system. Now i know better because the bacteria under the gravel use up a lot of the tank's oxygen and good enzymes.

But this moved an increatable amount of water, and lasted FOREVER!!!!

Pros: This product worked for YEARS!

Cons: I occasioally had to tak eit apart because hte motor for hot and melter the rings.

I have used marineland pumps/powerheads for almost 15 years. They are durable and very dependable.

Pros: dependable/durable

Cons: none