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AquaMaxx BioMaxx BioPellet Reactor - Standard


Item #: UJ5111

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AquaMaxx BioMaxx BioPellet Reactor

Controlling nutrients inside our aquariums is one of the keys to preventing nuisance algae growth. The AquaMaxx BioMaxx BioPellet Reactor is a finely-tuned fluidized filter designed to help hobbyists remove nitrates and phosphates from reef aquarium systems.

AquaMaxx BioMaxx bio pellet reactors are computer designed, precision-cut and made of polished A-class acrylic. All AquaMaxx media reactors are rigorously tested to ensure reliability, efficiency and affordability.

The AquaMaxx Bio Pellet Reactor utilizes a fluidizing plate to keep biopellet media suspended and evenly dispersed. The upward flow design provides maximum contact time between your aquarium water and the bio pellets inside the reactor. The Aquamaxx BioMaxx Biopellets Reactor also includes a special plate on the lid to keep media within the reactor without the need for sponges.

Adding a bio pellets reactor to your reef aquarium filtration system will improve the water quality for fish and other marine life. Biopellets initiate a more efficient denitrification process that removes nitrate and phosphate from aquarium water to prevent algae growth or harm to invertebrate and coral.

The AquaMaxx BioMaxx BioPellet Reactor requires a small pump/powerhead and tubing to push water through the reactor (sold separately). You can plumb the reactor using ¾" flexible tubing. Using a ball valve is highly recommended because it will allow you to dial-in the correct flow rate. A flow rate of 200-300 gallons per hour (GPH) is recommended for the AquaMaxx BioPellet Reactor. A flow rate of 300-600 GPH is recommended for the AquaMaxx BioMaxx XL BioPellet Reactor. Exact flow rates required to tumble the media will vary based on how much media is being used.

An optional hang-on adaptor (sold separately) is available for additional mounting configurations. For best results, use AquaMaxx BioPellets or similar biofiltration & nutrient control filter media.

All AquaMaxx products carry a 90-day manufacturer warranty and include detailed instructions and diagrams to help hobbyists get up and running immediately.

AquaMaxx BioMaxx BioPellet Reactor Specifications
  • Footprint: 5.5" x 5.5"
  • Diameter: 4" Chamber
  • Height: 12.6"
  • Capacity: 0.43 Gallons (1.6L) ~6.7 Cups
  • Recommended use: up to 200 gallons (light bioload), up to 100 gallons (heavy bioload)
  • A-class acrylic construction
  • Extremely efficient, reliable and affordable
  • Easy to setup and maintain
  • Ideal for nitrate and phosphate removal
  • Instruction manual with diagrams for setup and maintenance included
  • Inlet and outlet hose fittings for ¾" flexible tubing included.

Manufacturer information

AquaMaxx is a Southern California-based aquarium supply company that entered the market in mid-2008 with a line of affordable metal halide bulbs. The brand quickly gained recognition as word spread about the high quality and low cost of their lamps. In 2009, AquaMaxx released a line of aquarium filter socks and, in early 2010, unveiled an assortment of high-performance protein skimmer accessories and upgrades.

5 Stars


Reviewed on
February 12, 2020

Yes, I would recommend this.

Great product

I really like to see reactor but the only downside is it doesn’t come with any tubing

Was this review helpful? 0 1


Reviewed on
September 18, 2018

Yes, I would recommend this.


Nicely made. No complains. Hard plumb it to my manifold. Works great.

Was this review helpful? 0 0


Reviewed on
May 14, 2018

Yes, I would recommend this.

Nice, durable reactor

Pros: Size - diameter and height, well-built, multiple uses

Cons: Connections are difficult to make watertight

I really like this reactor. It has a good diameter to fit different sorts of media in it compared with some other reactors and the height is nice as well. It is sturdy and seems very durable. My only suggestion would be to make the connections easier to make watertight. It took me more than a few times to make the connections watertight after swapping out the bulkheads for the smaller size.

Was this review helpful? 1 0


Reviewed on
January 11, 2018

No, I would not recommend this.

Disappointed in this reactor

Pros: Nothing

Cons: Expensive and it didnt work for me.

This was the second biopellet reactor I have used on my 54 gallon reef tank. The first was a modified GFO reactor which was undersized and resulted in no movement of the biopellets even though I was using a maxijet 1200 on full blast. I decided to search for a reactor that was made solely for biopellets and found that this AquaMaxx BioMaxx got a lot of very good ratings and reviews. So I thought to myself that this is a can't miss product. My biggest need is to ensue the pellets are constantly tumbling and even though the price of this reactor is pretty steep I decided to take a leap of faith and purchase it. I was so excited the day I got it and immediately took it out and assembled it and attached it to my maxijet 1200 and set it up using the hang on attachment to the tank. The reactor immediately started to leak as soon as I plugged it in. The top cap of the reactor started to pour water out all over the floor and dangerously all over my electrical cords. Luckily I had a trip on the cords and everything shut down once it got covered in water. I didn't let this set back discourage me and methodically took apart the reactor and made sure I had assembled it correctly and made sure the thumb screws that held the lid secure were tight. I tried it again (this time in a bucket) and the lid was still leaking some so disassembled and reassembled and tried again. This took me about 5 tries to finally get it so the lid would not leak. For some reason the lid does not seat completely to the unit even when I tighten the screws to the max but I finally got it to secure. I then set it up on my tank and let her rip. I found I needed to crank the maxi jet 1200 to the max to get the pellets to tumble and I only had the reactor about 20-25% filled with pellets. Feeling good I went to bed and the next day found that there was some channeling where sections of the pellets would not tumble. I shook the reactor and that helped some but was only temporary. So thought maybe something got stuck and so disassembled, stirred the pellets and reassembled and tried again. That's when the whole leaking issue popped up again. After wiping the floor dry with a towel, I tried again and it stopped leaking after I pushed down on the lid hard while tightening the screws. Switched on the maxijet and same issue of channeling. I was starting to become very annoyed and so thought maybe my pump was too weak so I ordered another pump. A Sicce pump that was stronger than the MaxiJet and when it arrived I swapped the pumps and tried it (of course I ran into the leaking lid issue again and it took me several attempts to get it to stop leaking). I turned the Sicce pump all the way up (using a ball valve) and no improvement. Huge sections of the pellets were immobile while other sections were tumbling away. This was driving me crazy. I finally decided to return the unit and get a replacement thinking that I got a defective unit. Once the brand new unit arrived, I set it up. My hopes were dashed immediately when I turned on the pump and it leaked water from the lid. After spending the requisite 3-5 attempts to unscrew and rescrew the lid, I got it to stop leaking but using the more powerful Sicce pump resulted in the same issues of section of pellets not moving at all. I thought maybe the unit was not level but it was. I thought maybe something got stuck in the channels and so disassembled the unit to check and as I was assembling it back, my fear of the leaking caused me to use too much force and one of the lid screws broke which effectively made this reactor completely unusable. I sat there in defeat with the broken unit in my hands, my thumbs sore from twisting the small plastic screws, my shirt wet from disassembling and assembling, my eyes red from staying up so late trying to fix this problem and my hopes crushed that this reactor was a complete and utter failure for me. Fast forward to today and I recently set up the a different brand reactor, my third reactor, which was cheaper than the biomaxx and had very good reviews as well but had a unique design where the water was pumped from the top down. On my first attempt, using my old maxijet and with the unit 20% filled, this reactor had all the biopellets dancing and partying like it was 1999 and the pump was only turned up about 70%. My joy however was muted by the fact that I had gone through so much misery using the AquaMaxx. reactor whose carcass currently sits in the corner of my basement as a reminder that this product was unfortunately a complete failure for me. Hope it works better for others.

Was this review helpful? 0 3


Reviewed on
March 27, 2017

Yes, I would recommend this.

AquaMaxx BioMaxx BioPellet Reactor

As with all the other AquaMaxx products i have used, this product does not disappoint. Simple set up and tumbles biopellets evenly in the reactor. Just like any other biopellet reactor. To prevent floating and clumping at the top of the reactor at start up. You need to soak your biopellets for several hours prior to placing them in the reactor. Great product.

Was this review helpful? 3 0

michael manicone

Reviewed on
July 08, 2016

Yes, I would recommend this.

Great Reactor

Great quality reactor. I upgraded from a Two Little Fishes 150 to this. The design of this reactor allows for even flow and tumbling of the pellets in the reactor. Very easy to set up and maintain.

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myles weaver

Reviewed on
April 29, 2016

Yes, I would recommend this.

Bio pellets

I've used many different reactors for biopellets for many years and finally found one that works. Great build quality.great price.the unique water flow inside the chamber keeps all pellets tumbling. Even 2000ml of biopellets in this reactor is no problem.

Was this review helpful? 3 0

l h

Reviewed on
January 26, 2016

Yes, I would recommend this.

AquaMaxx Reactors

I am extremely impressed with the quality and performance of the BioPellet and PhosBan Reactors from AquaMaxx that I installed on my 150G. The one replaced the "Two Little Fishes" PhosBan reactor that would constantly leak even with new O-rings (very poor design and quality). The BioPellet reactor is new to my system. Both were easy to install and are very easy to maintain. Dealing with MarineDepot was painless!

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steve defrain

Reviewed on
January 04, 2016

Yes, I would recommend this.

Less algae

Good results, 4 months of use, algae down, nitrate and phosphate very low.

Was this review helpful? 1 0

timothy gentry

Reviewed on
December 05, 2015

Yes, I would recommend this.

AquaMaxx BioMaxx BioPellet Rea

Quality: Great Performance: Great I wish I had found this reactor sooner!

Was this review helpful? 2 0

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