Ocean Free Activa Block - Super-Charged Activated Carbon Block

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Ocean Free Activa Block - Super-Charged Activated Carbon Block
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Ocean Free Activa Block - Super-Charged Activated Carbon Block

Ocean Free Activa Block - Super-Charged Activated Carbon Block

The Ocean Free ACTIVA BLOCK has to be one of the best carbon-based filtration medias available on the aquatic market. This super-charged activated carbon block is designed to maximise the absorption of aquarium water discolouration, odours, toxic pollutants (e.g. insecticides and chemicals) and medication. Ideal for all types of marine and freshwater aquaria.

Highly-porous natural bamboo activated carbon and sepiolite clay minerals are precision cut into a cuboidal matrix design, featuring 1400 micro-tunnels. This greatly increases its surface area and boosts its ability to draw out toxic pollutants from your aquarium water quickly and efficiently. As a result, one cube has the equivalent absorptive capacity as 40 times its weight of regular activated charcoal powder. Therefore, the 250g cube absorbs to the same capacity as 10kg of regular activated charcoal powder, and the 500g cube to 20kg. Absorption test results carried out by the US EPA Methylene Blue Method shows the 250g block can absorb 1mg of Methylene Blue within 3 hours. Now that’s impressive!

The OF Activa Block can be used in any aquarium or sump tank that you wish to help remove toxic pollutants/discolouration/odours/medication. The block works best in aquaria with efficient water circulation and flow. The block requires no rinsing prior to use, and it may create bubbles for the first 30 seconds after adding it to the aquarium. 

Another useful but completely different use is, it can also be used to keep fruit fresher for longer by absorbing ethylene gas – simply place in your fruit bowl and see the difference!

Technical Specification:

Small  Large
Dimensions 100 x 50 x 100 mm 100 x 100 x 100 mm
Weight 250g 500g
Treat Aquariums up to 150 L 300 L

Product Highlights
  • Can be used in an external filer, sump or put straight into the aquarium
  • Rapid absorption of toxic pollutants, discolouration, odours and medication in your aquarium.
  • Absorption rates are equivalent to 20kg (for the 500g cube) or 10kg (for the 250g cube) of activated carbon
  • No pre-rinsing and filter-media bag required- simply place into your aquarium or sump.
  • Ideal for both freshwater and marine aquariums.

Delivery costs for your order will be calculated during the checkout process using your designated delivery address and chosen delivery method. You will only pay one delivery charge for your order and this will be calculated on your entire basket after you have entered your delivery address. If for any reason your products are not deliverable to your chosen delivery address, the checkout will inform you of this before your order is submitted.

Our chosen couriers are DPD and Royal Mail. If an order is dispatched directly from a manufacturer then you may have a different courier delivering your order. Full tracking details for all orders sent by DPD will be provided when your order is shipped. You can choose ‘Express Courier’ to receive this service on any standard order. Any order sent from our suppliers, or with DPD will only be delivered Monday - Friday.

All stated delivery times begin from the moment your order is accepted which is when your order is shipped from our warehouse our suppliers. An order confirmation email is not the acceptance of an order by us.

A signature is required for all orders sent via DPD, at which point the responsibility for all consignments passes to you. If you have specified another recipient (who is not you) for delivery purposes, then you accept that evidence of a signature by the said recipient (or another appointed person) at your delivery address is evidence of delivery and fulfilment by DPD and this accepts the transfer of responsibility to yourself.  

We do not ship orders internationally.

To see a full list of our delivery charges and to read our terms and conditions, click here.

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