December 21, 2005

Is there anything I can do fairly cheap to aid filtration in keeping new pond clean?

I have an above ground pond approx 9' by 9' that I built last year out of
block and cement.I put in three 3" koi and 8 2-3" goldfish.It has done the
trick nicely although it is shallow at the deepest only 18" and now that my
koi is about 16" long and I have 3 as well as 8 various goldfish about 6-8"
and 52 babies 1-3" long.I have not had too many problems with except for
cleaning on a monthly basis.I run it only naturally except for a submerged
sump pump.It pulls water from the deepest end of the pond up to a smaller
pond with crushed lava rock which overflows via a small waterfall into the
pond.This has run this way with many successful breedings for 18 months.
Now for my problem we are moving and I will construct a new pond much
bigger.the size is done for me as rock walls are already in place it will be
12' by 30' and it will be 5' deep so I think I should be able to safely fill
with 4' of water.Again I will cement the inside of the pond and can build a
waterfall for filtration.But is there anything I can do fairly cheap to aid
in keeping it cleaner.I have never had a fish die in my pond so I think
health wise I am ok. I live in the Azores. I had lava rock on the bottom until
I read one of your E-mails advising against it so now I only have it in the filtering
pond, But it is not enough and the new pond will be considerably bigger and
will be very expensive and time consuming to empty and change the water
every month as I have been. I did think of painting the inside with pool
paint but am not sure if this is a good idea or just leave the bare cement as
I did with the small one.


I recommend you install a bottom drain in this new pond. That will make your life much simpler. With the bottom drain and upgraded filter system, you will be able to manage the new pond much easier than the old smaller one. I recommend you dig the pond instead of building it above ground, use an external pump and filter, and the bottom drain. In order to connect these, put the bottom drain connection to a vortex or settling chamber (cone shaped to settle out larger debris), and then to go to the pump (with a pre-pump strainer basket). After the pump it should go to a filter, maybe a bubblebead filter (Ultima I I would be a good choice) and then the nice clean water will flow back into the pond. That will eliminate a lot of water maintenance and all you will have to do is 10% water changes weekly during the summer and 10% monthly in winter. If you can add a skimmer, you can put a submersible pump in there.


Happy Pondkeeping!

MacArthur Water Gardens

MacArthur Water Gardens
PO Box 3628
Alpharetta, GA 30023-3628

Posted by bfogle at December 21, 2005 02:19 PM