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Author Topic: Fish and tank  (Read 9875 times)
Ruthy
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« on: July 10, 2013, 02:04:07 PM »

Hey all, received this email from The Fish Vet (he has a blog I'm subscribed to). Thought it'd be interesting so have attached two screenshots of it.

The research shows that swimming space is not as important as water volume when it comes to fish size. Hormones secreted would be more dilute in the larger volume. The same result (I think) would occur if one was to do 100% water changes per day.


* Screen Shot 2013-07-10 at 19.58.20.png (184.67 KB, 634x526 - viewed 493 times.)

* Screen Shot 2013-07-10 at 19.58.29.png (194.86 KB, 570x529 - viewed 456 times.)
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Spuds
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« Reply #1 on: July 10, 2013, 02:55:45 PM »

Yeah i heard this before... With a constant supply if freshwater (100% change a day) fish can actually grow pretty large in a small space... People do pretty large water changes in grow out tanks because of this.

Sadly iv seen some people use this research to justify keeping large fish in tank where they can barely move.... But the fish do reach their mature size due to clean water.
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Ruthy
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« Reply #2 on: July 10, 2013, 03:02:07 PM »

Yeah i heard this before... With a constant supply if freshwater (100% change a day) fish can actually grow pretty large in a small space... People do pretty large water changes in grow out tanks because of this.

Sadly iv seen some people use this research to justify keeping large fish in tank where they can barely move.... But the fish do reach their mature size due to clean water.

Yeah, certainly not acceptable to have big fish in little tanks!
Also, with the average hobbyist it is unlikely that 100% water changes per day would be done and so this would not be good for fish in a tank too small for the adult size.
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russ
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I know where rasaqua's stuff is.....


« Reply #3 on: July 15, 2013, 07:19:52 PM »

All I can say is that it may work fine for clams, but for fish?.....I wouldn't bet my or my fish's life on it.

OK, that came from an average hobbyist's point of view. From a former hatchery owner's view; oh it's true. I had tanks and vats that got almost a 100% water change daily and the fish grew like weeds (along with a nice diet)
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"For every difficult question, there is an answer that is clear and simple and wrong."
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jerryfox
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« Reply #4 on: July 31, 2013, 10:35:03 PM »

Yeah i heard this before... With a constant supply if freshwater (100% change a day) fish can actually grow pretty large in a small space... People do pretty large water changes in grow out tanks because of this.

Sadly iv seen some people use this research to justify keeping large fish in tank where they can barely move.... But the fish do reach their mature size due to clean water.
It still not fair to the fish who are a large size to in prison them in a small tank even if the water changes are 100% everyday.I see this here constantly and it sickens me!
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Ravengod
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« Reply #5 on: August 12, 2013, 11:19:27 PM »

Very much for this great idea. I thank you for posting so much information on it.
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fishbro22
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« Reply #6 on: August 14, 2013, 04:10:52 PM »

I saw an article in one of my old AFI magazines talking about how overstocking is bad. He said that in one situation, one of the only ones he has ever seen actually work with overstocking, there was a big tank (I think 500 gallons) that was just FULL of fish, literally double what he would say heavy stocked. He was so amazed, he had to ask the management how they did it. They took him to the back room, where they showed him the BACK of the overstocked tank, another 500 gallons of fresh water being circulated through and hidden by a one way screen. I think this backs up your post, Ruthy, and also proves the importance of water changes.

But that still doesn't mean you should keep a fish in a prison, like jerryfox and Spuds said.
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Spuds
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« Reply #7 on: August 14, 2013, 05:53:16 PM »

Quote
Sadly iv seen some people use this research to justify keeping large fish in tank where they can barely move.... But the fish do reach their mature size due to clean water.

 question
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Ruthy
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« Reply #8 on: August 14, 2013, 11:51:23 PM »

That's very interesting fishbro! And I agree with the fish prison.
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