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Pax Bellum ARID N18 Macroalgae Based Bio Filter (40-120 US Gal Sys) $449 PRE-ORDER ONLY$75

Availability: In stock


THIS IS A PRE-ORDER for a deposit of $75.  Balance will be due at time of shipping.  Shipping is included.

The concept of using macroalgae as a method of nutrient export is not new. However, the introduction of the ARID (Algae Remidiation Illuminated Device) by Pax Bellum is a quantum leap forward. This ingenious device utilizes macroalgae (specifically Chaetomorpha) to function as a nutrient export mechanism. The unique design of the ARID incorporates a coaxial LED light tube to maximize light penetration and efficiency.

The tube and flange design within the device serves to isolate the algae from atmospheric CO2, which effectively limits the carbon source for the algae to just that which is respired by organisms within the aquarium. The ARID is analagous to a human lung for the aquarium, in that the ARID supersaturates the the aquarium with oxygen from the algae created during its respiration. Pax Bellum recommends running the ARID on a "reverse daylight" cycle (ie; opposite of the display aquarium). which helps to balance the natural day/night pH swing that occur, and to maintain high dissolved oxygen levels throughout the night when the display aquarium lighting is off and photosynthesis has ceased to occur. 

Use with the Triton Method:  One of the reasons we love this product is due to the fact that it is satisfies the need for the algae component when running the Triton Method.  This method relies heavily on algae as the heart of the filtration system.  Nutrients, namely No3 and Po4 are largely kept in check by an algae component roughly 15-20% of the system volume.  For aquarists that currently lack the space or ability to incorporate a large algae filter in their existing or new setup, this upright, sealed unit offers an excellent alternative. Because of the fast growing nature of chaetomorpha algae, we recommend placing it in the upper half if placing other algae in the same unit.  

Using the plastic spiral wraps installed in the unit, wrap several small clumps of clean chaetomorpha around the spirals, pinching it so it holds in place. 


System size: 40-120 gals

Body material- Cast Acrylic with Tyvek cover (to keep light inside) 

Total Height 16.5"

Recommended Flow rate: 150-200 gals per hour  

Recommended Pump: Maxijet 900 or equivalent

Total footprint 6.5"

Hose inlet/outlet:  1/2" FNPT hose (hose and pump not included)  

Placement:  Can be placed within the sump so long as the top of the unit always remains dry.  

LED Power Consumption: standard 110v/ 14 Watt.   (The supplied power supply can handle 220v input power with the use of a simple adapter cord to connect to the wall socket-  Mainly for European use)


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Pax Bellum ARID  N18 Macroalgae Based Bio Filter (40-120 US Gal Sys) $449 PRE-ORDER ONLY$75

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No matter what your reasons are for growing lots of Chaeto, the ARID filters are by and large the most sophisticated way to make that Chaeto grow. Operating on the principle of what Pax Bellum LLC calls "biological stoichiometry",  the balance of nutrients and reactants in a biological system by use of a biological medium as a nutrient export mechanism- in this case, macroalgae. The ARID has the capacity to drive down phosphate to levels required for vigorous "SPS" coral growth. This eliminates the need to purchase and utilize chemical filtration media which are utilized for the same purpose. It's exciting technology with proven results and great utility, and were excited to offer it to you!

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