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Retirement and forum shutdown (17 Jan 2022)

Hi,

John Howell who has managed the forum for years is getting on and wishes to retire from the role of managing it.
Over the years, he has managed the forum through good days and bad days and he has always been fair.
He has managed to bring his passion for fish keeping to the forum and keep it going for so long.

I wish to thank John for his hard work in keeping the forum going.

With John wishing to "retire" from the role of managing the forum and the forum receiving very little traffic, I think we must agree that forum has come to a natural conclusion and it's time to put it to rest.

I am proposing that the forum be made read-only from March 2022 onwards and that no new users or content be created. The website is still registered for several more years, so the content will still be accessible but no new topics or replies will be allowed.

If there is interest from the ITFS or other fish keeping clubs, we may redirect traffic to them or to a Facebook group but will not actively manage it.

I'd like to thank everyone over the years who helped with forum, posted a reply, started a new topic, ask a question and helped a newbie in fish keeping. And thank you to the sponsors who helped us along the away. Hopefully it made the hobby stronger.

I'd especially like to thank John Howell and Valerie Rousseau for all of their contributions, without them the forum would have never been has successful.

Thank you
Darragh Sherwin

PPM

  • Anthony (Anthony)
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25 Nov 2006 03:54 #1 by Anthony (Anthony)
PPM was created by Anthony (Anthony)
How do you convert mg/l into ppm.
What is the formular. :?: :roll:

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25 Nov 2006 06:20 #2 by zig (zig)
Replied by zig (zig) on topic Re: PPM
Think its the same, one = the other, maybe someone else could confirm that though.

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25 Nov 2006 07:45 #3 by serratus (Drew Latimer)
Replied by serratus (Drew Latimer) on topic Re: PPM
yeh correct mg/l =ppm, same thing.

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  • boroughmal (boroughmal)
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03 Dec 2006 11:54 #4 by boroughmal (boroughmal)
Replied by boroughmal (boroughmal) on topic Re: PPM
Not the case.
There are 1000 milligrammes to a litre
There are 1000000 parts to a million
therefore to convert knock off 3 O's from both figures
Therefore 1 mg = 1000 parts per million
easy innit lol
Regards

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03 Dec 2006 14:55 #5 by serratus (Drew Latimer)
Replied by serratus (Drew Latimer) on topic Re: PPM
all my test kits must be wrong?

1mg = 0.001g
1litre =1,000ml

1ml =1g of water
so 1 litre =1,000g (of water)
0.001(1mg)/1,000 (1litre) = 1/1,000,000 (1 part per million)

it does however change for salt solutions, you must divide mg/l by the sg(specific gravity) to get ppm

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  • boroughmal (boroughmal)
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03 Dec 2006 16:33 #6 by boroughmal (boroughmal)
Replied by boroughmal (boroughmal) on topic not quite
1milligram x 1000 = 1 litre = 1kilogram of water
Salt does not work that way, you need a hygrometer to measure specific gravity as salt content varies in diffrent waters & consolidates with heavy metals
Regards

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04 Dec 2006 00:27 #7 by davep (davep)
Replied by davep (davep) on topic Re: PPM
have a look at the converters on practical fish keeping's web site.

You may have to register as a user but it's free!!

www.practicalfishkeeping.co.uk/pfk/pages...ration_convertor.php

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04 Dec 2006 14:22 #8 by serratus (Drew Latimer)
Replied by serratus (Drew Latimer) on topic Re: PPM
a hygrometer measures humidity, as in reptiles/amphibians/spiders etc....
a hydrometer measures specific gravity.
anyway, thanks davep for the link, a handy piece of kit! i was beginning to wonder!

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