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Is it the Volume or Water or Size of tank that matters?

This is a discussion on Is it the Volume or Water or Size of tank that matters? within the Beginner Freshwater Aquarium forums, part of the Freshwater Fish and Aquariums category; --> Originally Posted by Byron David Boruchowitz who is Editor-in-Chief of Tropical Fish Hobbyist magazine and an experienced aquarist. Is this the same guy that ...

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Is it the Volume or Water or Size of tank that matters?
Old 11-29-2011, 08:03 PM   #11
 
Quote:
Originally Posted by Byron View Post
David Boruchowitz who is Editor-in-Chief of Tropical Fish Hobbyist magazine and an experienced aquarist.
Is this the same guy that 'proved' oscars can live 'happily' in the equivalent of a 5 gallon tank?

Found the article,

Part 1
http://www.tfhdigital.com/tfh/200911...x7VMLm1Ir#pg89

Part 2
http://www.tfhdigital.com/tfh/200912...x7VMLm1Ir#pg81

Last edited by Ridewithme38; 11-29-2011 at 08:22 PM..
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Old 11-29-2011, 08:48 PM   #12
 
Lets go with the units he used in the article, generically called pollution units, in this case we'll go with a number of 10 pollution units per goldfish...just to make it easy...the average goldfish tank is recommended as 20 gallons for the first fish and 10 gallons more for the second....with 10x the tank volume in filter per hour, and weekly 50% water changes...we would assume the recommendation is that way because it cleans the tank

So two goldfish would put out 20PU, in a 30 gallon tank that would be .66PU per gallon, a 50% water change would reduce that to .33PU per gallon with the 10x filter per hour(.033 per full tank cycle) further reducing that to 0PU

Now lets do those number with my equipment and a 23 gallon tank...

Two Goldfish still product 20PU, in a 23 gallon tank that is .86PU per gallon, a 50% water change on weds reduces that to .43PU(its too complicated with two water changes) now my filters run about 700GPH, so that is 30x the tanks volume an hour, and we've established that recommended specs pull .033 per cycle) that means my filters now filter out .99PU's from the water in an hour...That leaves me with NEGATIVE .56PU's in my tank

Lets try this math without water changes(i'd never not do water changes)
two goldfish 20PU, 23 gallon .86PU per gallon, .033 per cycle with 30 cycles = .99PU, it is still Negative .13PU

Last edited by Ridewithme38; 11-29-2011 at 08:51 PM..
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Old 11-29-2011, 09:25 PM   #13
 
Meh, please ignore those last few posts from me...just fought with the ex...i shouldn't have posted
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Old 11-29-2011, 10:59 PM   #14
 
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Is there a reason you are trying to convince yourself to get the smaller tank? Unless it's a money issue just get the larger tank. The fish will be better off for it no matter what the math says.
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Old 11-29-2011, 11:13 PM   #15
 
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Originally Posted by Nubster View Post
Is there a reason you are trying to convince yourself to get the smaller tank? Unless it's a money issue just get the larger tank. The fish will be better off for it no matter what the math says.
Honestly? The Goldfish are my daughters, although she only lives with me every other weekend and three weeks over the summer.....But because of the height of the stand i have...and her being 6....she has alot of trouble feeding the fish when she's here, although she loves them and is hardly away from the tank when she's here...we have a stool we use, but its a fight to get her not to use the tank to 'pull herself up' and i don't want to have to yell at her everytime she's over daddy's...having the tank as made a big difference in the struggles to have her leave mom's house...i'm trying to keep it as enjoyable as possible for her

A shorter tank would make a HUGE difference....so i'm kinda trying to justify something shorter then the current 19" tall tank i have now
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Old 11-30-2011, 12:22 AM   #16
 
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So I realize that this may be taken as me stepping into a parental area that I do not belong, but I honestly don't mean it that way. I'm not trying to butt in, promise! I'm just thinking that maybe there's a way to work this out so everyone wins, fish included. So, some thoughts... maybe you could get the bigger/taller tank, and try alternate routes with your girl. My little girl uses a step ladder, and I have her put her hands on the top of the ladder as she climbs on. You could even mark the hand spots in her favorite color paint? Or with stickers? Or you could have her climb on a desk chair and, while holding her securely, roll her to the tank. (Of course, you'd have to keep holding her as long as she's on the chair.) Or could you fashion a place where she could safely put her hands that isn't on the tank? Like a broomstick or something that's been placed at about the height of the tank rim but is secured to the walls or tank stand? Or just lowering the stand, either by modifying the legs of it, or using a different stand? Since she loves the fish so much (which is adorable), maybe if she understands how her actions could hurt the fish, she'd try hard to be careful of her hands. I don't know, just some thoughts. My "Aquarium Assistant" is 7 years old and, like you, I'm so glad we have this hobby together! Good luck!
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Old 11-30-2011, 06:36 AM   #17
 
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Do you already have the goldfish? I may have missed that if you do. If not...you may consider a different fish or group of fish that would work better in the smaller tank. I understand now why you are trying to make the small tank work...it's a tough balance trying to do whats best for your little one and the fish.
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