Hang on Back (HOB) Aquarium Filter Setup:

A hang on back filter attaches itself to the wall of the aquarium & only the intake tube of the filter is inside the fish tank & the rest of the filter is located at the rear of the aquarium.

Hang on Back is a very transparent, well-designed & attractive filter. It can clean water & needs lower maintenance as compared to other filters because components of this filter are setup above water level & there is no need to put your arm inside water & take out components for cleaning / maintenance. Gently wash the mechanical media when it gets dirty. The Hang on Back filter has 6 compartments for storing media. The size of each chamber is small & this filter comes with its own media. The first chamber is for holding mechanical filter media while the other 5 chambers are used for storing bio media. For this filter, I am using an Aqua Pro AP 550 pump which seems powerful for this filter. I think it is better to use a 200 L/H flow rate water pump for this filter or water will overflow through the filter & it won’t be helpful.


Hang on Back HOB Aquarium Filter Setup


Unboxing & installing Hang on Back filter:

In this video you can watch how to unbox & install a Hang on Back filter:



A Hang on Back does not need hoses for drawing water from the fish tank. It needs to be hanged at the back of the aquarium, & it will extract water using a tube & a pump.

HOB has multiple compartments for cleaning water efficiently. It can store mechanical, chemical & biological filter media.

 

Hang on Back filter specifications:

  • Get a look at specs. & features of HOB filter:
  • Material: Acrylic
  • Model: 6 Grids
  • Filter Dimensions: 17.71 x 2.75 x 3.14 inch

 

Features:

  • High quality acrylic
  • Extremely transparent, stylish & lovely
  • External filter box is included in this package for aquarium
  • Multi-functional fish tank accessory pump for filtration of water & aeration

 

6 Grids Aquarium Filter:

Hang on Back External filter is made of Acrylic. When you unbox HOB filter, you will find the following items:


Unboxing Hang on Back HOB Filter
Unboxing Hang on Back HOB Filter


  • Hang on Back filter box
  • Water hose
  • Mechanical filtration media
  • Bio media

 

Dimensions of HOB Filter:

  • Length: 45 CM
  • Width: 7 CM
  • Height: 8 CM

 

Setup Filter Box & Rinse the Media:


Remove stickers & rinse filter box
Remove stickers & rinse the filter box

Remove the stickers from both the filter box & its dividers. Rinse HOB filter box & media before using it for fish tanks.

 

Ceramic Rings:


Rinsing Ceramic Rings
Rinsing Ceramic Rings

Ceramic rings are the best home for good bacteria. The surface area of ceramic rings is enhanced using tiny pores. The outer region of this ring has little pores, & a large central hole allows water to flow through it. Water passes through the outer & inner part of the ring.

If the surface area of bio media is large then it will house more good bacteria.

 

Crushed Corals:


Rinsing Crushed Corals
Rinsing Crushed Corals

Crushed corals are used for increasing water PH. If you are keeping fish that prefer low to neutral PH then crushed corals should not be used. If your tap water has very low PH then you can use crushed corals to increase it. Also, if you are keeping fish that needs high PH like African Cichlids, then crushed corals are very important. Crushed corals offer a salt water feel to a freshwater tank.

 

Filter Gravel:


Rinsing Filter Gravels
Rinsing Filter Gravels

Filter gravels can hold back precipitates comprising pollutants. They are very effective in cleaning water.

 

Lava Rock:


Rinsing Lava Rocks
Rinsing Lava Rocks

It is a very porous & great filter media. It can provide an anaerobic environment inside lava rock, for converting nitrates into oxygen & nitrogen. Nitrates are dangerous for fish so lava rocks can help in wiping out nitrates in a natural & perfect way.

 

Why is rinsing media required before using it?


Rinsing filter media will wash the dirt
Rinsing filter media will wash the dirt

Rinsing media can wash the dirt on the filter media. Soak bio media in dechlorinated water before using it for aquarium purposes.


How to Setup HOB filter:


Connect brackets & hanging clip to the filter
Connect brackets & hanging clip to the filter

Attach brackets for HOB filter. Connect the hanging clip. Slide down the dividers to convert the large filter box into 6 small compartments that are used for storing mechanical & biological filtration media. The first compartment is used for storing foams that can trap physical waste particles. The rest of the compartments can store bio media.


Setup mechanical & biological filter media:

Now it is time to add mechanical & biological filtration media to the filter compartments.

 

Mechanical Filter Media:


Add foams to the first compartment of HOB
Add foams to the first compartment of HOB

Mechanical filtration media traps the solid waste particles in aquarium water. Water free of fish waste, debris, dirt, & other solid particles, flow through the biological filtration media. Mechanical filtration media consists of foams for removing waste. Usually foams are graded as coarse, medium & fine. Coarse foam traps all big particles. Small particles flow through the coarse foam & are trapped by medium foam. And tiny particles may even pass through the medium foam but fine foam stops them. Hence for effective water filtration, it is recommended to use all three types of foams in the following order: coarse, medium & fine. 

Read: DIY Aquarium SUMP with Aquaponics Filter


Biological Filter Media:

Bio media breaks toxic ammonia into nitrites, & nitrites into nitrates. Ammonia is less toxic than nitrite, & nitrite is less toxic than nitrate. Ammonia & nitrites are highly toxic to aquarium fish. This is the reason why bio media is a very important part of every filter. Nitrates in mass amounts is very dangerous for aquarium inhabitants too. Bio media can convert nitrates into oxygen & nitrogen.


Setup biological filter media in remaining compartments
Setup biological filter media in remaining compartments
 

First compartment contains foams for mechanical filtration media. I have added filter gravel in the second compartment. Crushed corals go into the third compartment. Live rocks are added to the fourth. Fifth & sixth compartments are filled with ceramic rings.

 

Water Pump:


Connect suction cups to the back of the pump
Connect suction cups to the back of the pump


Unbox pump & attach suction cups to the back of the pump.

Water Pump is used for extracting aquarium water. Water pushed by the pump passes through all compartments where it is cleaned & then it flows back to the aquarium through a spill-way.


Connect a hose to the pump nozzle
Connect a hose to the pump nozzle


Connect a pipe to the nozzle of the pump. Then attach a hose to it. Other end of the hose should be connected to the filter.

The water pump that I have used for HOB filter has the following specifications:

AquaPro AP550 Water Pump:

Water Flow: 550 L/H, Power: 7W, Voltage: 240 V

12 MM Inlet / Outlet Size


Connect HOB to the Pump:


Hang on Back filter setup completes
Hang on Back filter setup completes

Connect the Hang on Back filter to the water pump using a hose. Run the pump & it will soon draw water from aquarium to the filter. 550 L / H is an extremely high flow for this filter. Consider using a pump that only offers 200 L / H of water flow.


Pros & Cons of Hang on Back Filters vs Canister filter:

  • After filtration of aquarium water, HOB filter sends water back to the aquarium through a spill-way. It is easier to install a HOB filter than a canister filter.
  • It is easy to clean water & this filter needs maintenance after every 2 weeks. It will clean water efficiently after regular maintenance.
  • Similar to a canister filter, HOB is a highly customizable filter. Fill this filter with your own filter media if you want like a canister filter.
  • A Hang on Back filter is a lower-price filter than a canister filter because the HOB filter is not very efficient in cleaning as compared to a canister filter. It is suggested to use HOB filters for small to medium aquariums instead of buying a canister filter which is a little too much for a small setup because such tanks do not need an extremely efficient filter. For large aquariums, Canister filter is a better choice than an HOB filter.
  • Also, both filters have different designs. You can simply setup a hang on back filter, just by clipping it to the rear of the fish tank. It does not need high space, but ensure that you have some space at the rear of the aquarium.
  • A canister filter is usually located outside the aquarium. It has 2 hoses for drawing water from the aquarium & sending water back to the aquarium. It is a bit hard to install a canister filter as compared to its competitor.
  • HOB filters need low maintenance, & they are cheap & simple to setup. They are highly reliable & work fine, & both experts & new aquarists prefer them.
  • Hang on Back filters can oxygenate water. Anything that breaks the surface of water will add oxygen & circulate the water.

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