Go Back   Aquarium Advice - Aquarium Forum Community > Freshwater > Freshwater & Brackish - General Discussion
Click Here to Login

Join Aquarium Advice Today
View Poll Results: Do you believe in the "Inch Per Gallon" rule?
Yes, I live by it. 5 7.14%
No, it is a load of garbage. 65 92.86%
Voters: 70. You may not vote on this poll

Reply
 
Thread Tools Search this Thread Display Modes
Please support our sponsors and let them know you heard about them on AquariumAdvice.com
 
Old 04-22-2009, 04:39 PM   #21
Aquarium Advice Freak
 
Join Date: Dec 2008
Location: El Paso, TX
Posts: 201
Quote:
Originally Posted by underdog5004 View Post
I think for a beginner, 1 inch per gallon is a good rule to live by. This rule can be stretched if you add live plants to the tank, increase the frequency of water changes, upgrade to awesome filtration (canister instead of hob).
Personally, in my 10G tank I've got about 22 inches of fish (guppies, mollies, platys), but I've also got about 2 pounds of anacharis, java moss and christmas moss in the tank as well. Nitrates are ~4ppm, nitrites and ammonia are 0ppm. I also do about 30% water change about once a week.
If you put a 5 inch Discus in a 10 gallon tank, it would not live long.
You also have to consider body mass.

Charles

__________________
cbwmn is offline   Reply With Quote
Old 04-22-2009, 05:26 PM   #22
Aquarium Advice Addict
 
bs6749's Avatar
 
Join Date: Jun 2006
Location: Paw Paw, MI
Posts: 2,493
Quote:
Originally Posted by cbwmn View Post
If you put a 5 inch Discus in a 10 gallon tank, it would not live long.
You also have to consider body mass.

Charles
I'm not so sure about that. A friend of Jack Wattley actually bred discus in 10g tanks. There is an article out there somewhere and I need to find it!
__________________
bs6749 is offline   Reply With Quote
Old 04-22-2009, 05:46 PM   #23
Aquarium Advice Freak
 
Join Date: Dec 2008
Location: El Paso, TX
Posts: 201
Quote:
Originally Posted by bs6749 View Post
I'm not so sure about that. A friend of Jack Wattley actually bred discus in 10g tanks. There is an article out there somewhere and I need to find it!
It may live, but not happily.
Would you like to live like like Scott Peterson?
He lives in a 4 ft X 9 ft cell for 19 hours a day.
A 5" discus can swim four times itís length horizontally
and two times itís length laterally
and twice itís height vertically in a ten gallon aquarium.
That's just plain cruelty.
I still stand by my statement; you HAVE to consider body mass
when figuring how many fish an aquarium can support.
You can probably support 20 white clouds in a 10 gallon with enough filtration,
but not ONE discus or other large fish.

Charles
__________________
cbwmn is offline   Reply With Quote
Old 04-22-2009, 07:14 PM   #24
Aquarium Advice Addict
 
bs6749's Avatar
 
Join Date: Jun 2006
Location: Paw Paw, MI
Posts: 2,493
Not living happily? Then how do you explain them reproducing? If a fish is stressed, the LAST thing it will do is reproduce. Now take into consideration that you have two 5" fish in a 10g tank lreproducing and you should be able to see that neither one is stressed.

I agree, it's not realistic to keep them there, but who is to determine exactly how large the tank SHOULD be for them? How do we know that even if we had a 1000g tank with a pair of discus they wouldn't feel confined? We really don't (as far as I know) so we have to look at their behavior. Color change and "personality" changes in fish are indicators that something is wrong and we need to pay attention to them to figure out what the problem is.

I think it all boils down to an ethical dilemma and people trying to put themselves in the position of the fish.
__________________
bs6749 is offline   Reply With Quote
Old 04-22-2009, 07:23 PM   #25
Aquarium Advice Addict
 
krap101's Avatar
 
Join Date: Feb 2004
Location: Roscoe, IL
Posts: 6,082
Send a message via AIM to krap101
Suprisingly no one has voted for it. The inch per gallon is something used as training wheels for people who are just starting. If its well filtered, and there's enough plants, I'm sure you could maybe quadruple (or even more) the inch per gallon *theory*. But then again, you need to look at aggressiveness, movement, size, bioload, and location (top middle bottom)
__________________
~ Danny
krap101 is offline   Reply With Quote
Old 04-22-2009, 07:25 PM   #26
Aquarium Advice Addict
 
krap101's Avatar
 
Join Date: Feb 2004
Location: Roscoe, IL
Posts: 6,082
Send a message via AIM to krap101
Quote:
Originally Posted by cbwmn View Post
It may live, but not happily.
Would you like to live like like Scott Peterson?
He lives in a 4 ft X 9 ft cell for 19 hours a day.
A 5" discus can swim four times itís length horizontally
and two times itís length laterally
and twice itís height vertically in a ten gallon aquarium.
That's just plain cruelty.
I still stand by my statement; you HAVE to consider body mass
when figuring how many fish an aquarium can support.
You can probably support 20 white clouds in a 10 gallon with enough filtration,
but not ONE discus or other large fish.

Charles
You also have to look at the fact its being bred, and I'm sure once the babies are born, they will get moved into a bigger tank. It is much easier to watch/manage a fish in a smaller tank. When your having a baby, do you do it in a 10 x 10 hospital room or a 20 mi x 20 mi open mountain range? (maybe its a bad analogy but it gets the job done)
__________________
~ Danny
krap101 is offline   Reply With Quote
Old 04-22-2009, 09:15 PM   #27
Aquarium Advice FINatic
 
Join Date: Nov 2008
Posts: 564
you guys want to talk about over stocking hows this for you.

one time we had to keep a 3 ft caimen croc in a 40 gallon tank for 2 weeks while we awaited his new enclosers arrival... how does 100% water changes every day sound to you guys?


-Brad
__________________
Brad.Sedore is offline   Reply With Quote
Old 04-22-2009, 09:50 PM   #28
Aquarium Advice Freak
 
colematthewmalaka's Avatar
 
Join Date: Feb 2009
Location: Three Hills, AB the wheat capital of Alberta!!!
Posts: 290
With small fish i find it works well but many people on this forum think its a load of crap i don't believe that and think that it should be used sensibly.
__________________
colematthewmalaka is offline   Reply With Quote
Old 04-22-2009, 11:17 PM   #29
Aquarium Advice Addict
 
bs6749's Avatar
 
Join Date: Jun 2006
Location: Paw Paw, MI
Posts: 2,493
Quote:
Originally Posted by B.Sedore View Post
how does 100% water changes every day sound to you guys?


-Brad
Not nearly as bad as the guys that keep discus and change out 50% every day on dozens of tanks, which can amount to hundreds of gallons per day. Some breeders in Asia do 100% water changes 6 or more times per day.
__________________
bs6749 is offline   Reply With Quote
Old 04-23-2009, 12:05 AM   #30
Aquarium Advice Apprentice
 
Leeny's Avatar
 
Join Date: Jun 2008
Location: in my house
Posts: 46
I don't think it's a good rule to live by because you also need to account for the width of the fish. Fish aren't 2D creatures, they have mass which means waste. The rounder the fish, the more waste produced.
__________________
29 gallon FW planted bowfront: 6 ember tetras, 4 endler's livebearers, 2 sparkling gouramis, 1 cherry shrimp, 4 amano shrimp
Leeny is offline   Reply With Quote
Old 04-23-2009, 12:15 AM   #31
cfd
Aquarium Advice Apprentice
 
Join Date: Jul 2008
Posts: 15
Basically, it's a good guideline for smaller fish but it's silly when people follow it as if it's some kind of law.

For example, I used to have 4 mollies (about 3" each) in a 10 gallon and they were just fine.
__________________
cfd is offline   Reply With Quote
Old 04-23-2009, 12:18 AM   #32
Aquarium Advice Freak
 
Join Date: Dec 2008
Location: El Paso, TX
Posts: 201
Quote:
Originally Posted by Leeny View Post
I don't think it's a good rule to live by because you also need to account for the width of the fish. Fish aren't 2D creatures, they have mass which means waste. The rounder the fish, the more waste produced.
Thanks Leeny
That's what I mean. Body mass should be the primary consideration, not the length of the fish.
Charles
__________________
cbwmn is offline   Reply With Quote
Old 04-24-2009, 04:49 PM   #33
Aquarium Advice Apprentice
 
Join Date: Feb 2009
Location: Los Angeles
Posts: 39
So everyone - body mass - so does that mean if I have skinny long fish I can keep a lot more fish? I seem to get a lot of crap from all sorts of people on this forum and others when I mention what I have in my tank - yet my fish are healthy. I'm always amazed when people are extremely rude because of difference of opinions. I even stopped coming to this site for awhile because people need to push their opinions to the point of obnoxiousness. So, without being obnoxious, what about eels and gobies and knife fish that are long and lean? What do you think about that, especially since I have 6 filters (no one has that many that I have ever seen), water changes 30% weekly, 1/2 planted 125 gallon aquarium. According to this site on another thread and another fish forum, I really couldn't have much at all. Just wondering since this thread seems a little more liberal in allowing people to keep more than a couple fish in a tank, even in a 125. But, I'm sure I'd still be looked at as a fish Hitler anyway.
__________________
boogie is offline   Reply With Quote
Old 04-24-2009, 05:37 PM   #34
Aquarium Advice Freak
 
cogburn's Avatar
 
Join Date: Feb 2008
Location: bangor, pa
Posts: 492
well... boogie... what do you have in your tank?
__________________
180 gallon mbuna tank... 29 gallon community tank.
cogburn is offline   Reply With Quote
Old 04-24-2009, 05:45 PM   #35
Aquarium Advice Apprentice
 
Join Date: Feb 2009
Location: Los Angeles
Posts: 39
Eels, gobies, knifefish
__________________
boogie is offline   Reply With Quote
Old 04-24-2009, 06:29 PM   #36
Aquarium Advice Addict
 
Fishyfanatic's Avatar
 
Join Date: Dec 2004
Location: Illinois
Posts: 11,964
This is why the inch per gal guideline isn't followed all the time. It depends on the type of fish in question. Some fish, like Bala's, require larger tanks due to their adult size and aggression. Same with African Cichlids. You could theoretically keep a 5" African cichlid in a 5 gal tank going by the inch per gal guideline. But in all reality? No way. It's the agression factor and the need to have plenty of free space to swim. Some fish need the open space whereas others, like Corys, do not.
__________________
Vote for Aquarium Advice

29 Gallon Lake Malawi Fry
55 Gallon Community
150 Gallon Lake Malawi Cichlid
Fishyfanatic is offline   Reply With Quote
Old 04-24-2009, 09:00 PM   #37
Aquarium Advice Newbie
 
SomethingSmellsFishy's Avatar
 
Join Date: Jun 2008
Location: Florida
Posts: 13
nah, I don't live by that rule. There are so many other factors one must take into consideration when deciding how many fish to keep in a tank. Some fish are messier than others, some have special needs, etc.
__________________
SomethingSmellsFishy is offline   Reply With Quote
Old 04-24-2009, 10:38 PM   #38
Aquarium Advice Regular
 
Bigfoot1030's Avatar
 
Join Date: Mar 2009
Location: Iowa, USA
Posts: 81
I agree there are too many other factors to consider.
__________________
Happy Fish Keeping!!
Bigfoot1030 is offline   Reply With Quote
Old 04-25-2009, 08:51 AM   #39
Aquarium Advice Freak
 
cogburn's Avatar
 
Join Date: Feb 2008
Location: bangor, pa
Posts: 492
even in the saltwater side of it a little... tangs get to be what 6"... but they need a 6' tank cuz they need swimming room... so by the inch rule i could have a yellow tang in a 12 gallon nano right... WRONG
__________________
180 gallon mbuna tank... 29 gallon community tank.
cogburn is offline   Reply With Quote
Old 04-25-2009, 10:18 AM   #40
Aquarium Advice Regular
 
Bigfoot1030's Avatar
 
Join Date: Mar 2009
Location: Iowa, USA
Posts: 81
Cogburn, great example!! Same can be said with a ten gallon. 10 1" neons or 1 10" Oscar.
__________________
Happy Fish Keeping!!
Bigfoot1030 is offline   Reply With Quote
Reply

Tags
inch per gallon

Please support our sponsors and let them know you heard about them on AquariumAdvice.com

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Inch per gallon? Hookman Saltwater Reef Aquaria 13 03-12-2008 01:04 AM
The 1 inch per gallon rule - A discussion BrianNY Freshwater & Brackish - General Discussion 12 10-01-2005 10:09 PM
1 inch per gallon, Piff...... virus Aquaria Off-Topic 31 08-23-2005 11:05 PM
1.5 inches/gallon vs. 1 inch/gallon stocking level dax29 Freshwater & Brackish - General Discussion 5 05-15-2005 02:43 AM
Inch per gallon SittingDuck Freshwater & Brackish - General Discussion 9 03-14-2005 03:43 PM







» Photo Contest Winners







All times are GMT -4. The time now is 04:38 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2023, vBulletin Solutions, Inc.