This table shows that theoretically you need
about 20 times more volume of foam or 5 times more volume of Lave Rock to do the
same job as a single unit of Alfagrog ... in other words if you need 2 litres of
Alfagrog you need 40 litres of foam and 10 litres of lava rock. The practical
and cost implication of this is that you need a MUCH smaller lower cost
container for a biofilter containing Alfagrog than other media such as plastic
tubes">
This table shows that theoretically you need
about 20 times more volume of foam or 5 times more volume of Lave Rock to do the
same job as a single unit of Alfagrog ... in other words if you need 2 litres of
Alfagrog you need 40 litres of foam and 10 litres of lava rock. The practical
and cost implication of this is that you need a MUCH smaller lower cost
container for a biofilter containing Alfagrog than other media such as plastic
tubes, foam, lava rock, hair curlers and so on. Making a biofilter is very simple and it will be
as effective as most shop bought products, probably better ... see opposite Some tips to consider if you decide to build
your own pond biofilter .. 1. Up flow through the bed of Alfagrog is best
... in this case it is also an improvement to create an empty space at the
bottom of the container into which the pumped water first flows (use a plastic
crate section or something similar) to create this void ... any solids can then
tend to settle out before the water enters the bed of Alfagrog 2. Put the Alfagrog inside a string bag to make
removal quick and easy for cleaning purposes. Clean as often as you like buy
always use pond water. 3. By using Alfagrog there is no need for any
foam or brushed inside your filter. 4. Alfagrog costs about R22 per litre so for
around R100 you can build an effective biofilter for a pond of about 1,000
litres. Even for a 5,000 litre pond cost
should not exceed about R350. (Sourced from http://www.focuskoi.co.za/biofilterselection.htm) For more information on the topic, please view our forum with hundreds of up
to date articles by koi specialist. See
http://www.koionline.forumotion.com/forum.htm or
http://www.koiforum.co.za
KoiOnline.co.za
- Tel: 0829273605Send mail to koi@absamail.co.za with
questions or comments about this web site.