Need Help? Call us at 1-317-895-9005
or email us at

Proudly serving Aquarists since 1996

Maxspect Nano-Tech Anaerobic Block 2pcs

$20.99 was $ 29.99
Item #
Eligible for Free Shipping Program
In Stock

Nano-Tech Nitrate Removing Filter Blocks
Maxspect Nano-Tech Anaerobic-Blocks efficiently remove nitrates from fresh and marine aquariums. This proprietary technology is specifically designed to stimulate the growth of anaerobic bacteria which completes the nitrification cycle essentially breaking down nitrates into the form of nitrogen gas. The Nano-Ceramic beads in the Anaerobic Blocks are specially treated to excel at establishing anaerobic heterotrophic bacteria which strives in anoxic environments. The porous structure is the ideal living condition and environment for bacterial colonies, and will not decompose or become brittle. 
x2 pcs - 3.75 x 3.75 x 1in Anaerobic-Blocks treat up to 1,000L/264 Gal
x1 - Anaerobic Denitrification Catalyst
How to Use
Place directly in the sump, stack two Anaerobic Blocks on top of each other, and place a Denitrification Catalyst in between the blocks as illustrated to the left. The Denitrification Catalyst should be replaced every two months. The Anaerobic-Block should be cleaned or replaced every six months for optimal results. However, it is suggested to only clean or replace half of the Anaerobic-Block so that bacterial colonies remain and established themselves on the new or recently cleaned blocks.  
CoralVue, Inc. and Maxspect hereby guarantee this product to be free from defects in material and workmanship for a period of:
1 Year
Warranty is activated on the date of purchase.
This Standard Limited Warranty applies and is limited as follows:
To the product only as long as it remains in the possession of the original purchaser.
To the product that has not been subject to accident, misuse or abuse.
To the product that has not been modified, altered, defaced, or had repairs made or attempted by other than CoralVue, Inc.
That CoralVue be immediately notified in writing within ten (10) days of first knowledge of defect by owner or his agent.
That CoralVue, Inc. shall be given first opportunity to make any repairs, replacements or corrections to the defective construction within a reasonable period of time.
Under no circumstances shall CoralVue and/or the Manufacturer be liable by virtue of this warranty or otherwise for damage to any person or property whatsoever for any special, indirect, secondary or consequential damages of any nature however arising out of the use or inability to use because of the product defect.

Customer Reviews

You must be logged in to post a product review.

Disappointed Anaerobic Nano Tech Aug 10, 2022
No reduction Nitrates .First set was installed in April.....added two more sets hoping for the best but no results...The theory of how they would work sounded feasible.....using it on a well established 400g reef tank. Heavily stocked and fed......