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

Join Aquarium Advice Today
Reply
 
Thread Tools Search this Thread Display Modes
Please support our sponsors and let them know you heard about them on AquariumAdvice.com
 
Old 02-26-2020, 04:39 PM   #1
Aquarium Advice FINatic
 
rlederer's Avatar
 
Join Date: Sep 2012
Location: Northern California
Posts: 505
Fasting Fish

There is lots of anecdotal information on fasting fish - not feeding them once a week or every other day or on weekends. The reasons given are cleaning out digestive tract or letting the fish clean up scraps. But no evidence is cited,just stories, so I perused the scientific literature and : according to several experiments, fasting fish have their digestive hormone balance disrupted for the fasting day as they have been acclimated to a certain pattern the other days of the week, and their glucose level drops. Second, fish feeding in the same area, especially those of the same species, develop a social/dominance order during feeding time and not feeding them temporarily disrupts this order.

That said, fasting is not particularly harmful to fish and they recover quickly. So it's ok to leave them for a day or two or week without food.
But fasting does not help the fish so although it is not harmful, it is not beneficial.
__________________

__________________
Roger (always pH) Lederer
rlederer is offline   Reply With Quote
Old 02-26-2020, 05:17 PM   #2
Aquarium Advice FINatic
 
Join Date: Mar 2010
Posts: 832
I've always wondered about the plus/minus effects of fasting. I *sort of* understood the reasons given for doing it but had never searched for proof to back up the reasons given. I have only ever fasted fish before an auction to keep the bagged water as *clean* as possible so seeing that it isn't a recommended practice I'll stick with alternating regular and *smaller* feedings as opposed to *no* feedings
__________________

__________________
earhtmother is offline   Reply With Quote
Old 02-27-2020, 12:25 AM   #3
Aquarium Advice FINatic
 
Join Date: May 2011
Location: VA
Posts: 960
I think this doesn’t quite take into account the chronic overfeeding of some aquarium fish and that some fish are indeed prone to swim bladder issues from constipation.

In a lightly/ moderately stocked tank a fast day gives the fish incentive to forage; eat leftover food that went unnoticed or the plethora of micro crustacean life that thrives in a well established aquarium. And it serves as a protective measure against the constipation and swim bladder issues in some species of fish that are prone to it.

You are correct that it is not a universal good but I would argue that you can’t say it’s a universal negative either. Some tanks / species will do better with a fast day, some it would be neutral or harmful (heavily stocked tanks and not chronically over fed fish for example.) As with most things you need some context to decide if a fast day occasionally would be a benefit to your particular community.

My glofish tank does not; it’s heavily stocked and they’re aggressive eaters. My shrimp tanks are full of foragers and Pygmy cories who eat the micro life in the tank. They only get fed a few days a week.
__________________
libertybelle is offline   Reply With Quote
Old 02-27-2020, 01:39 PM   #4
Aquarium Advice Addict
 
BBradbury's Avatar
 
Join Date: May 2011
Posts: 5,011
Hello rl...

If you feed a small variety daily, the fish will be fine. Most have a stomach the size of one of their eyes, so they don't require much food. A fasting day is fine, but if you change half or more of the tank water weekly, you'll remove any waste material that's dissolved in the water. If you keep the water keeping hobby simple, you'll be more successful.

B
__________________
"Fear not, my young apprentice. Just change the tank water."
BBradbury is offline   Reply With Quote
Reply

Tags
fish, sting

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
Fish fasting day. The importance? kashif314 Freshwater & Brackish - General Discussion 41 03-25-2017 09:25 PM
A day of fasting? mustangmp96 Freshwater & Brackish - General Discussion 9 06-29-2011 01:43 PM
Fasting vitacrux Cichlid Discussion 4 05-28-2011 06:54 PM
Fasting? PBirdsong Freshwater & Brackish - General Discussion 5 09-23-2005 11:48 AM
Fish fasting patryuji Freshwater & Brackish - General Discussion 7 02-27-2004 09:51 AM







» Photo Contest Winners







All times are GMT -4. The time now is 07:14 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.