75 gallon vs 90 gallon?

[discusmatt20]

Just wondering if you could put more discus in a 90 gallon (48Lx18Wx25T) than a 75 gallon (48Lx18Wx21T)? The 90 is only 4" taller so i was wondering if that makes a difference in the # of discus you could put in a tank as a permenant home?

-Matt

[sandy]

Just wondering if you could put more discus in a 90 gallon (48Lx18Wx25T) than a 75 gallon (48Lx18Wx21T)? The 90 is only 4" taller so i was wondering if that makes a difference in the # of discus you could put in a tank as a permenant home?

-Matt

90 gallon will good as you will not fill your water till top

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[Bill63SG]

90 gallon will good as you will not fill your water till top

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***?Dont know what that means.Technically,its the surface area,and they have the same surface are.But if you keep up on your waterchanges,the 90 allows you to change more water.For a display I'd take the 90,a bigger"window".For a grow-out,I'd go 75.

[Trier20]

75=7 adult discus 90=9 adult discus so yes more discus can fit in a 90

[discusmatt20]

90 gallon will good as you will not fill your water till top

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I think i understand what your saying lol


***?Dont know what that means.Technically,its the surface area,and they have the same surface are.But if you keep up on your waterchanges,the 90 allows you to change more water.For a display I'd take the 90,a bigger"window".For a grow-out,I'd go 75.
Ya and we all know the more wc's the better!



75=7 adult discus 90=9 adult discus so yes more discus can fit in a 90

Yes i know thats what people say but why when the 90 is only 4 inches taller? im pretty sure 2 discus cant fit in a 4" tall tank..

[LizStreithorst]

Unless your tall and long armed or have your heart set on one or two more fish, go with the 75

[discusmatt20]

Unless your tall and long armed or have your heart set on one or two more fish, go with the 75
Ok. So i can put 1 or 2 more discus in there with the extra 4"? Was not sure but if so maybe i will because i am pretty long armed lol. Thanks for the help.

[manzpants92]

Ok. So i can put 1 or 2 more discus in there with the extra 4"? Was not sure but if so maybe i will because i am pretty long armed lol. Thanks for the help.

Its not really about the extra height, its more about the extra 15 gallons of space you'll have with the 90 gallon

[discusmatt20]

Its not really about the extra height, its more about the extra 15 gallons of space you'll have with the 90 gallon

O ok. Thanks for the help :)

-Matt

[joeymac]

It's not the 4" that could allow you to keep another fish or two... It's the 15 extra gallons of water (with a properly stocked, filtered, and maintained tank)

Edit: sorry somebody beat me too it. That post wasn't there when I started my reply.

[discusmatt20]

It's not the 4" that could allow you to keep another fish or two... It's the 15 extra gallons of water (with a properly stocked, filtered, and maintained tank)

Edit: sorry somebody beat me too it. That post wasn't there when I started my reply.

Ok thanks for the help haha

[wannadivesteve]

So it's gallons that are important, not surface area? I'm gonna make me a tank that's 17 inches long X17 inches front to back and 72 inches tall, that'll be 90 gallons. Whoohoo - 9 adults!

Frankly, I don't see any difference between the tanks the OP listed other than visual. If you're making daily WCs just make slightly larger ones on the 70 than the 90 and they'll be getting the same amount of new water every day, have the same surface area for gas exchange, etc.

[joeymac]

So it's gallons that are important, not surface area? I'm gonna make me a tank that's 17 inches long X17 inches front to back and 72 inches tall, that'll be 90 gallons. Whoohoo - 9 adults


That's obviously rediculous. Based on that same ridiculousness I could say...

"Oh it's surface area that's important and not water volume? I'm gonna make a tank that's 48 inches long X 24 inches front to back and 6 inches tall. Plenty of gas exchange for 9 adults!!!"

We were just telling him that instead of focusing so much on the 4" of extra HEIGHT (which had nothing to do with surface area by the way)... that the better benefit in that situation was the extra water volume.

[YSS]

Get a 120G and put more discus in it.

[Elliots]

I agree with Yun. Instead of increasing the height, stay at about 24", increase the widfth from 18" to 24". To get an idea of cost I checked Glasscages extensive list yesterday but I could not find this thread again to post on. Their prices are about $244 for a 90 gal and about $364 for a 120 gal. I am not sure if I remembered the prices correctly. Do you have room for a tank that size? Please keep in mind if you go to 31" high it is very difficult to clean the bottom.

[wannadivesteve]

That's obviously rediculous. Based on that same ridiculousness I could say...

"Oh it's surface area that's important and not water volume? I'm gonna make a tank that's 48 inches long X 24 inches front to back and 6 inches tall. Plenty of gas exchange for 9 adults!!!"

We were just telling him that instead of focusing so much on the 4" of extra HEIGHT (which had nothing to do with surface area by the way)... that the better benefit in that situation was the extra water volume.

A 90 gallon that is deeper front to back than that 70 gallon, as Elliots mentioned, would definitely hold more fish more capably than the 70 gallon. I'm not so sure that a 90 gallon that is just 4 inches taller without increasing surface area would make that much of a significant difference. My point in the rediculous dimensions on the uber-tall tank is that it's not about gallons as it's about surface area... the 17X17X72 tank is indeed 90 gallons, but it's got little for surface area and really is a poor choice for a lot of fish of any type... I was trying to make a point. Gallonage is not everything. I see little difference between a 70 and a 90 with the exact same footprint.