Very good powerhead. I use a Aquaclear 70 model to mix water for my saltwater reef tank. A Hydor Koralia is a better choice however these are still good powerheads. The reverse flow feature is a very nice plus.

Not the best powerhead, but not junk either.

The larger models produce to much heat to be used safely I think, but some of the small models are ok, especially on a budget. Also, pretty large for it's flow rate.

Easy to install, clean and maintain. Lots of room for extra media like polishing floss or ph buffering agents like peat or crushed coral. Simple to use and I would suggest this filter for any newbie. I like to have 3 to 4 times the suggested filtration for my tanks and the AQ filter box sizes and shapes allow me to do that easily.

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Wendy :-)

The design of the intake strainer on this absolutely terrible. If you use this powerhead in a tank without the prefilter attachment installed you run a very high risk of loosing livestock. The impeller design is not very good either. There is a plastic piece that acts as a cog to keep the magnetic drum and the blades spinning together, this cog wears out before the rest of the impeller does and makes the powerhead very noisey. I use it in my mixing/top-off tank as that is the only safe place for it. Big thumbs down for this Hagen product.

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Considering a Marine Aquarium? A Breakdown of the Components, Live Rock, Cycling a Marine Tank

"The capacity to learn is a gift; The ability to learn is a skill; The WILLINGNESS to learn is a choice." - Unknown

I am using the AC70 powerhead with the quickfilter attachment for added mechanical filtration in my 220 gallon freshwater tank. Dead quiet. Great flow. Good options to turn down the flow and to even reverse the flow if needed. It is a little larger than the competition but in my application that hardly matters. The quickfilter attachment will be reviewed separately.

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8 tanks running now:
1x 220 gallon, 2x55 gallon, 1x40 gallon long, 1x29 gallon, 1x20 gallon long, 1x5.5 gallon, 1x2 gallon
Gouramis, barbs, rasboras, plecos, corys, tetras, fancy guppies, swordtails, ottos, rainbow shark, upside-down catfish, snails, and Max and Sparkles the bettas.

I have an aquaclear 50 on my 29 gallon swordtail tank, it keeps the water fairly clear with minimal noise and current output. The flow features are cool, but I hardly notice a difference between full flow and minimal flow. Still not bad for the price, but I will be researching other brands.

Ive had two of these and two of them have broken in a matter of weeks. I lose impeller blades, and sometimes the just stop. They also clog very easy!

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Google is your friend. Use it!!!

These aquaclear model powerheads are pretty good for entry level setups. Larger models can cause excess heat. They do pump out a decent amount of flow but it doesn't take much to clog the impeller, especially in planted tanks. The venturi is pretty adjustable and comes in handy. They are a bit bulky but i would recommend then for low tech tanks that need added flow and added oxygen.

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40 Gallon Breeder Planted: harlequin rasbora rummynose tetra corydoras cherry barbs

40 Gallon Breeder Reef: In progress!

I run two AC50s in my river tank using a manifold system. They work very well to push a lot of water. Because this tank is cold water in a cool area of the house, any heat put off by the pumps is nominal. The attachment to hang this powerhead off the side of the tank is very flimsy and probably only usable if attached to a UGF to prop it up. Advertised as adjustable flow rate. Really it only has two settings. High and not so high.

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Increasing your biodiversity increases your stability.

You know what this tank needs? ........................ Crypts.