August 23, 2005

Today's Pond Q&A

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Today's Pond Q&A

In this issue:

- SAND FILTERS - FOR LARGER PONDS?

- WELL WATER - HOW CAN IT BE USED FOR PONDS?
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Question>

Carolyn,

I think I understood from your response to the sand filter
question that they were not good for ponds. Why is it that they
are suggested as part of the filtration in larger natural ponds
like the aqua scape systems?

We’re about to crank up a 200,000 gal pond with gravel over
slotted pipe in the bottom and several glass bead filters and UV
sterilizers to polish things up… what’s the scoop?

Thanks, Kerry

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Answer>

Yes, Kerry, I said sand filters are not recommended for koi
ponds. Sand filters were developed for use with chemicals, such
as swimming pools with chlorine, and have limited oxygen flow
which creates an ideal environment for anaerobic bacteria. These
filters are excellent for filtering out minute particulate
matter, but not for bio-filtration.

In koi ponds we recommend the bio-filtration for the health of
the fish as well as the cleanliness of the water. The water could
be very clean (clear) and yet contain lethal doses of ammonia,
nitrates or nitrites, none of which are visible but are silent
killers.

This is the primary difference between pools and ponds with fish.

What you are describing in your large pond (lake?) sounds perfect
because under the rocks you have the oxygen/water flow through
the pipe. The large pebbles, versus sand, will permit the almost
unobstructed flow to both clean and aerate the bottom of the
pond.

- Carolyn

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Question>

Carolyn I have a good water supply but has iron which most wells
around here has, so can i filter it some how to remove the iron
and stuff and use in my pond?

Farrell Sutton

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Answer>

Hi Farrell,

I wonder what else is in your well water and is it safe to drink?

As for the iron removal, yes, you should be able to get a filter
to remove the excess minerals in the water in order to use in the
pond and might want to check with the local plumbing supply
company.

However, if the water is not deemed safe to drink, I would not
use it in the pond either. Fish are susceptible to high levels
of bacteria or other contaminants that exist in many ground water
supplies. In many areas the well water has been banned other
than to water gardens or crops. Please check first.

- Carolyn

==

Happy Pondkeeping!

MacArthur Water Gardens
www.macarthurwatergardens.com

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

Posted by bfogle at August 23, 2005 12:05 PM
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