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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

ro water ph ?

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02 Jan 2014 18:16 #1 by anthonyd (Anthony Debesne)
Hi guys
I just bought some ro water the tds reading is 013 but the ph is 7.9.
I thought the ph of ro was between 5 and 6, now i m a bit confused. :(
Could someone enlighting me on this ?
I bought the water thinking it will helps lower the tds and the ph as well.
Thanks
Anthony

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02 Jan 2014 20:15 #2 by igmillichip (ian millichip)
RO water is not as pure as people make out even if the RO system is in "perfect" working order.
It is, however, never intended to be pure water.

There is no real reason to assume the pH should be below 7....to do so is really a false assumption.

Now, having said that, it is alway worth checking if the RO system is working efficiently.

pH is a funny old thing, and so are some of the things that contribute to the pH.

RO water, if the RO system is working perfectly, will give very unstable water. pH can swing quite dramatically in such water.

ian

Irish Tropical Fish Society (ITFS) Member.

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02 Jan 2014 21:33 #3 by anthonyd (Anthony Debesne)
Thanks ian
digital ph meter showed 7.8
Api liquid test showed 6.2
Nutrafin liquid test showed 5
maybe there are no ways of measuring it acuaratly without lab equipment ?
After dripping ro in the tank slowly the ph and tds have decreased a bit.
Is it true than the kh would be the most important paramater for fishes and invertebrates ?
Regards
Anthony

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02 Jan 2014 22:25 #4 by igmillichip (ian millichip)

Thanks ian
digital ph meter showed 7.8
Api liquid test showed 6.2
Nutrafin liquid test showed 5
maybe there are no ways of measuring it acuaratly without lab equipment ?
After dripping ro in the tank slowly the ph and tds have decreased a bit.
Is it true than the kh would be the most important paramater for fishes and invertebrates ?
Regards
Anthony


The different pH readins shown are showing an acid concentration differing by 630 times !!!!!.....(that is the difference between pH 5 and pH 7.8).

With the digital meter.....they do need to be calibrated and used correctly (eg used with the water being stirred).

In an un-buffered water (as you would get in RO water) then very very small impurities or residue in test tubes or on pH meters can affect the results quite substantially.

KH is NOT the most important parameter for aquatics. It's value does, however, relate to other parameters and we may see "symptoms" of inappropriate KH in those other parameters.
But, a certain KH does often indicate a level of stability wrt buffering.

ian

Irish Tropical Fish Society (ITFS) Member.

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