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If you’ve been keeping fish for any length of time, chances are you’ve heard of AquaClear filters.

They’ve been around for quite a while, and many consider them to be the best HOB filters on the market because they’re quiet, efficient, reliable and generally work great.

The AquaClear brand is owned by Hagen, which also owns popular filter brand Fluval.

With that kind of pedigree, you know this company produces quality aquarium products, and AquaClear filters are no different.

In this review, we take a close look at the AquaClear 70 HOB Filter and examine whether this truly is the best HOB filter for your tank.

Quick Overview AquaClear 70 Power FIlter

Aqua Clear - Fish Tank Filter - 40 to 70 Gallons - 110v

Get The Aqua Clear 70 HOB Filter

What Are The Best Features Of The AquaClear 70

  • Highly recommended because they’re quiet, efficient, reliable and affordable.
  • Uses a bottom-up design usually only found in canister filters so all your water passes through the filter media.
  • Great media capacity & easy to custom fit custom media due to the large and easy-to-access compartment.
  • It comes with AquaClear Foam, Activated Carbon, BioMax and Cycle Guard. All of this media provides three stages of filtration (mechanical, chemical, and biological).

What You Need To Know About The AquaClear 70

AquaClear filters are very well-known and highly-recommended in the fishkeeping community.

They provide excellent filtration, nearly silent operation, and legendary durability. People regularly run these things for years without any problems.

Although the AquaClear is a HOB aquarium filter, it uses a bottom-up design usually only found in canister filters. This means the water rises up from the bottom of the filter, rather than trickling from the top down.

It also has a huge filter container that is much larger than what you’ll find in other HOB filters, which allows you to customize your own mix of media and really pack it in for optimum filtration.

With this design, there’s nowhere for the water to go but through the filtration media.

This filter also has a patented refiltration system that increases contact time by cycling the water back through the filtration media. The highly efficient pump has a high flow rate and low energy consumption.

From Hickster 58

What Sizes Are Available?

The AquaClear 70 is part of Hagen’s AquaClear line of filters that includes:

  • AquaClear 10: Up to 10-gallon tanks, 80 gph flow rate
  • AquaClear 20: For 5-20 gallon tanks, 100 gph flow rate
  • AquaClear 30: For 10-30 gallon tanks, 150 gph flow rate
  • AquaClear 50: For 20-50 gallon tanks, 200 gph flow rate
  • AquaClear 70: For 40-70 gallon tanks, 300 gph flow rate
  • AquaClear 110: For 60-110 gallon tanks, 500 gph flow rate

All filters in the AquaClear line offer the same features and benefits, just for different sized tanks. To ensure the most efficient filtration, we recommend getting the higher model for your tank.

For example;

Both the AC50 and AC70 would work for a 50-gallon tank, but we would recommend going with the larger AC70 for greater capacity.


  • Can hold huge amounts of filtration media compared to other filters.
  • Large filtration volume allows you to mix and match media.
  • Dead silent and efficient operation, so you can rest easy.
  • Provides excellent filtration capabilities.
  • Comes highly recommended by many owners, so you know it works.


  • Instructions are not the greatest, but with YouTube this is no problem at all.
  • Debris can get trapped in propeller box and will need to be cleaned out.
  • The lid may rattle a little bit, but this is easily fixed.
  • AquaClear media bags are a tad pricey, but you can easily use your own media.

Click here to see more popular HOB Filters

Hands On AquaClear 70 HOB Filter

Everything you need to set up this filter is in the box, including filtration media. It comes with AquaClear Foam, Activated Carbon, BioMax and Cycle Guard.

All of this media provides three stages of filtration (mechanical, chemical, and biological).

The media container on this thing is enormous. Most HOB aquarium filters have media trays, but the AquaClear 70 filter has an open container instead.

This allows you to use a ton of media for better filtration and lets you experiment with your media mixture. The flexibility you have with this is a huge selling point.

The overall build quality is solid. It’s definitely made of plastic, but the materials are on par with what you’ll find in most filters. Durability should not be an issue, and many people keep these running for years.

The filter operation is whisper-quiet, but we did notice a slight rattle from the lid shaking against the top of the filter.

This is a quick fix if you’re concerned about noise.

You can either keep the lid off completely or place a weight on top of it. We ended up putting our fish food container on top of the lid and it solved the problem.

Buy The AquaClear 70 Power FIlter

If you’re looking for a great aquarium filter for your tank, the AquaClear 70 is a no-brainer.

It has a great reputation that is backed up by its efficiency, durability and overall quality. The clear water you’ll have in your tank after installing this filter will speak for itself.

If you have a few more dollars to spend, you could also consider the Fluval C-Series, Hagen’s other line of high-quality hang-on-back filters.

The C-Series offers some additional features and upgrades over the AquaClear filters. But, at the end of the day, you really can’t go wrong with the AquaClear 70 Power Filter.


Aqua Clear - Fish Tank Filter - 40 to 70 Gallons - 110v

Get The Aqua Clear 70

Further Reading: If you’re looking for more great filters consider checking out our review on the New Fluval 07 Series Canister Filter which is a seventh-generation product with more than forty years of history and noted as the best selling canister filter of all time.