Description
Alfagrog
Alfagrog is a volcanic rock, proven to be a successful filter media as it ideal for the colonization of beneficial bacteria. The porous composition of this media allows the bacteria to multiply in abundance over a short period of time. The sharp edges of this natural rock require careful handling, and it is best situated in the last chamber of your filter, as you would not want your Koi rubbing against it! Remember to wear protective gloves whilst cleaning.
Why is it so effective:
The key to effective biological filtration is choosing media with the highest surface area possible to allow beneficial bacteria to colonise and remove waste from the water. Alfagrog has an extremely high surface area by volume compared with other types of filter media on the market.
Alfagrog is very inert and soon colonises with beneficial bacteria. Alfagrog is made of a highly porous material that contains many thousands of tiny pockets in which bacteria can thrive making in an ideal material for biological filters
Its only draw back is its sharp on the hands when cleaning so please wear gloves..
Benefits over other filter media:
- Extremely high surface area
- Highly porous
- Inert, pH neutral
- Lightweight
- Available worldwide
- Economical
- Available in 15kg sacks
Only logged in customers who have purchased this product may leave a review.
How are shipping works
We have several different ways of shipping available on our website for you to select when you go through to checkout
1, We use Evri for our Economy service this service can take between 2 and 5 day This service starts from £4.90
This is because Evri collect from us on a Monday and Thursday only which will be a Tuesday and Friday delivery to you
2, We use DPD for our premium/standard service which is next working day delivery This service prices start from £7.95
This is collected from us Monday through to Friday This is NOT a Guaranteed next day delivery service however it is a overnight service and is quite often delivered to you the next day, excluding remote areas
3, We use Dx Freight for our standard large service for things like Pipe lengths and larger items This service is £19.95
This is on a next working day delivery and is Monday through to Friday.
4, We use APC for our Fish delivery service This service is £35
This is an overnight service Koi will be scheduled to arrive between 8.00am – 12:00 midday.
You also MUST be in to sign for the koi.
Delivery days are Wednesday, Thursday & now Fridays and will always be pre arranged with you
5, Some larger items and bespoke items are dropped shipped this is to speed up delivery
6, We also ship from our supplier from warehouse again this is to speed up delivery
7, We also offer Free Delivery on orders over £100 excluding lengths of pipes and live fish
Lengths of pipe are sent with DX and have a price of £19.95
Live fish are sent with APC and have a price of £35.00
All our shipping company’s do give us tracking information that you should receive by email this includes any orders we drop ship.
simon hall (verified owner) –
As described
Anthony D. (verified owner) –
Brilliant
Anonymous (verified owner) –
Good price
carl a rushbrook (verified owner) –
Ryan riches (verified owner) –
Quick delivery .I have previously bought this excellent product for my trickle filter
Robert Johnson (verified owner) –
Barry Hulme (verified owner) –
Great product but slow delivery
Kalem Harrison (verified owner) –
Anonymous (verified owner) –
Top seller many thanks
steven (verified owner) –
Good price quick delivery. Recommended.