Fluval AquaClear 70 Review: Is This Hang On Back Filter Still The Best?

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

Value For The Money 99
How Quiet Is The Filter 89
Ease Of Installation 90
Ease Of Maintenance 95
Filtration Capacity 85
Flexibility, Flow Rate, Input, Output 88

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 an 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

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

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.

More Popular HOB Filter Brands

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 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.

By |2018-11-28T18:19:17+00:00July 24th, 2016|Fish Tank Filters, Product Reviews|Comments Off on Fluval AquaClear 70 Review: Is This Hang On Back Filter Still The Best?

About the Author:

Jack Dempsey has over 20 years of experience with freshwater aquariums, his goal is to help beginners avoid the biggest mistakes when getting started. If you find something helpful please share it on your favourite social network. If you need help with anything send Jack a question.