Water Gardens Gazette number 304

Water Gardens Gazette February 1th, 2003 - Number304 _____________________________________________ This Issue sponsored by ... Focus Garden Products Pty Ltd Compiled by Tony Roocroft PROMOTION: Would you like a FREE copy of my e-book in pdf? ........... "Your Pond: Crystal Clear Water Guaranteed, 2nd Edition"   To qualify for this 180 page book you will need to agree to a reciprocal linking of web sites. If you are interested in creating an internet link back to me then do please e-mail me at link back I will then send you full details. If your site is garden related I would also offer a reciprocal link from my directory site that can be found at .. About Water Gardens Gazette Water Gardens Gazette is a free periodical featuring important aspects of water gardening in all its forms. It covers tips, How To ... articles, answers to frequently encountered pond and water feature problems of all kinds. It is published around every two weeks with special editions being produced when deemed worthwhile. We would ask you to pass this Gazette as a complete document to friends you may have who you think would like to improve their pond keeping hobby. You can contact us any time at: mailto:info@pondsandpumps.co.za?subject=gazettequery Comments are always very welcome. They encourage us to do better.

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This edition includes ....................

1. Free pond calculator as promised (all calculators are in Microsoft Excel .xls format). This edition's calculator is:
"Calculate saving By Running 2 Pumps"
2. Biofilters ...... making your own and bio-starters
3. This edition's quick tips
4. New articles: covers all kinds of topics related to water gardens
5. This is also address where all editions can be found and where you
can ask questions we will try to answer

Subscribe and unsubscribe information

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1. FREE POND CALCULATOR ...............

As promised when you subscribed you will be able to get a
free calculator by going to the following web address.

Free pond calculator one of a series of 12 pond calculators to collect

This edition's free calculator will allow you to work out the money it is easy to save by thinking about using 2 pumps.

Last week I explained why two pumps in a pond are almost always better than a single pump. This might sound strange but it is true.

If you did not read this article I suggest you take a quick look by going to the web page where it is posted. You will then benefit more from this week's free calculator:

http://www.practical-water-gardens.com/gazette303.htm

New subscribers can access these previous calculators at Free pond calculators

INSTRUCTIONS TO DOWNLOAD:
All you need to do is go to the web page above and click the link. The calculator will open up in Excel automatically. Save the file to your selected folder.

You can learn about what each calculator does by visiting:

Learn about all the water garden ponds calculators here

Of course you can get all 12 calculators free in one go by
buying my book "Your Pond: Crystal Clear Water Guaranteed."
Read more about it here:
Receive all 12 FREE water garden ponds calculators when you buy my book


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2. Biofiltration and bio starters or bacteria starters

I received a very interesting question from a lady reader this week. In essence the question was what is difference between a biofilter and the powder she throws into her pond every week as recommended by a dealer.

The powder she was referring to is called a bio-starter or bacteria starter. These powder products are offered by many companies and are probably worthless in practise. Some products are available in liquid form.

The powder is supposed to be a mixure of naturally occurring bacteria that are also found in biofilters.

The types of bacteria required for effective biofiltration are Nitrosomonas and Nitrobacter.

Nitrosomonas bacteria convert ammonia to nitrites and Nitrobacter bacteria convert nitrite to nitrate (in fact life is not as simple as this but this explanation suffices for this article).

Some manufacturers claim that their bio starters contain Nitrosomonas and Nitrobacter. Now it is extremely diffiult to freeze dry and keep alive such sensitive bacteria so any claim should be backed up by definitive proof of the fact that such powders do contain those bacteria and they are in a form that will work. If there was a viable population when packed then the question to be asked is are the bacteria still viable ater "x" weeks on a shelf in non-controlled conditions.

If the concoction does not contain Nitrosomonas and Nitrobacter then what value is it anyway?

In these newsletters and my book I do my best to make sense out of pond keeping to save people money and hassles so they can enjoy their pond keeping and without having to do too much work.

Here is a classic example of a product sold in large quantities world-wide without any value being added to a pond.

A well known technical/practical writer on the subject of biofiltration is Gerry Preston. Gerry lives in the UK and is a regular contributor to Nishikigoi International magazine. Gerry claims spitting into the pond has as much value as adding bio staters and probably more.

Spit apparently contains living Nitrosomonas and Nitrobacter.

For reasons explained in a previous edition a biofilter is absolutely essential if you want to keep fish in a pond. In my opinion it is cruel not to install a biofilter since without a biofilter the fish will live in a potentially highly toxic environment.

A biofilter will automatically start itself up once fish are introduced into a pond.

Nitrosomonas and Nitrobacter are naturally occurring and will rapidly find their own way into the filter. They then need oxygen from circulating water as well as excreted ammonia from the fish (this occurs naturally) to thrive and multiply. It will take some considerable time for the biofilter to reach maturity. For this reason add more fish slowly over a perod of time - do NOT add many fish all at the same time.

Building a biofilter is simplicity itself and low cost for most small garden ponds. I have published a new web page with a diagram showing how simple it is. Take a look at these two sites:

designing a biofilter

making a boxed filter

To summarize:
Think carefully before buying any so called bacteria starter or bio starter. In general do not add anything to a pond unless you understand why you are doing it and are sure of the benefit to be gained.