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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

pearl danio

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11 Nov 2012 09:41 #1 by newbejkjimk (damien kelly)
Hi all,
in a small community tank i have 2 pearl danios bought at the same time and were the same size, and now about 4 months later on one of them is huge about 2.5 times the size of the other it measures about 8cm and the other one is about 3.5 cm and i was wondering why is there such a discrepancy in size would it be gender?
here are some pics excuse quality they were taken on my phone.


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11 Nov 2012 09:59 #2 by JohnH (John)
Replied by JohnH (John) on topic pearl danio
Looking as hard as I can, but only see one Pearl Danio - presumably the larger one?

Is there a chance we can see the two together to compare them?

John

Location:
N. Tipp

We're just two lost souls swimming in a fish bowl - year after year.


ITFS member.



It's a long way to Tipperary.

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11 Nov 2012 10:10 #3 by newbejkjimk (damien kelly)
Hi john,
yeah i didn't manage to get the two pearl danios and i'm in work at the moment so can't take any pics. yes the one in the pic is the large one as i say though the smaller one is less than half the size o the big one, the smaller one is fit and healthy so i don't think he is the runt or anything!

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11 Nov 2012 10:46 #4 by igmillichip (ian millichip)
There are number of possible explanations that range from normal to not so normal.

the smaller one could be ill;

the larger one could be more dominant, gets more food, and is acting on the water to stunt the smaller ones growth;

once one fish gets a bit bigger, then it is better at getting food and thus can accelerate its growth;

drag on the fish (I don't mean a fish in High Heels and flowing dress !!) will also affect the growth, so the smaller one may not have had the right position in a group when swimming against the flow of water (more energy in swimming means less growth);

fish will grow at different rates to some extent, there is a natural variation;

increased partial water changes will allow more food to be added and also remove growth stunting compounds from the water.

In some fish species, the number of fish in a tank affects the growth. Now, that is not as logical as it sounds as some fish will grow fast in a sparsely populated big tank, but some species tend to grow faster when kept in large groups.

Hope that helps as for 'possible reasons'

ian

Irish Tropical Fish Society (ITFS) Member.

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11 Nov 2012 11:06 #5 by newbejkjimk (damien kelly)
Hi ian,thanks.
Yeah its interesting and its not a big problem and i'm sure the smaller one is healthy as he is always on the go same as most danios and eats lots. I just posted to see others opinions and was wondering if i had a genetic freak?

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11 Nov 2012 11:29 #6 by igmillichip (ian millichip)

Hi ian,thanks.
Yeah its interesting and its not a big problem and i'm sure the smaller one is healthy as he is always on the go same as most danios and eats lots. I just posted to see others opinions and was wondering if i had a genetic freak?


Well, it could be a genetic freak, but more likely than not it is something that many people experience.

The whole idea of stunted growth is a valid question, and some fish are affected more than others and the effects for some species can be quite damaging.

In some species, however, what we often see as a 'big specimen' is probably only a medium sized one....and it does not seem to affect the fish at all.

You may, on the other hand, not have a problem small fish but you could have a potential biggy 'big' fish.

ian

Irish Tropical Fish Society (ITFS) Member.

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11 Nov 2012 16:29 #7 by Acara (Dave Walters)
Replied by Acara (Dave Walters) on topic pearl danio
It's more likely Ian is correct, but are you sure they're both the same species? There's a lot of danios that can look similar, and mis-naming is common place.

always on the lookout for interesting corys.pm me if you know off any!

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11 Nov 2012 17:09 #8 by newbejkjimk (damien kelly)
As far as i can tell they are both the identical except for size.

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