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Old 11-08-2019, 10:55 AM   #1
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Coldwater fish for 20 gallon tall tank?

So I've always wanted to do a coldwater aquarium. I also have a standard 20 gallon tank lying around so I decided nows a good a time as any. I just have a few questions since there are a bunch of coldwater fish.

Rosey red minnows- I know they are feeder fish but can they be bred to be healthier? Like if I buy the parents, and treat them immediately for parasites etc. Will they breed and I'll eventually end up with healthier fish?

A Pompom goldfish, is that just no for a 20 gallon tank?

Should I just go with white cloud minnows?

Are there any interesting oddball coldwater fish for a 20 gallon tank?


What plants do well in a coldwater tank?
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Old 11-08-2019, 11:10 AM   #2
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Hello Sara...

A taller tank isn't a good idea for Goldfish. Because of their size, they'll require more oxygen. A taller tank doesn't have enough surface area to maintain a suitable oxygen level for Goldfish. The White Clouds would be the best choice. These fish come in a light fawn and a dark brown, almost black color. I'm breeding them in a 100 gallon trough and both fish have some streaks of red. They'll stay small, no more than an inch or so. Keep some type of floating plant like Anacharis to make the fish more comfortable and you'll have a nice tank.

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Old 11-08-2019, 12:38 PM   #3
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Quote:
Originally Posted by SaraB View Post
So I've always wanted to do a coldwater aquarium. I also have a standard 20 gallon tank lying around so I decided nows a good a time as any. I just have a few questions since there are a bunch of coldwater fish.

Rosey red minnows- I know they are feeder fish but can they be bred to be healthier? Like if I buy the parents, and treat them immediately for parasites etc. Will they breed and I'll eventually end up with healthier fish?

A Pompom goldfish, is that just no for a 20 gallon tank?

Should I just go with white cloud minnows?

Are there any interesting oddball coldwater fish for a 20 gallon tank?


What plants do well in a coldwater tank?
Check out the Celestial Pearl Danio.
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Old 11-08-2019, 01:08 PM   #4
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Thanks Bbradbury but I was kind of hoping for something other than just typical white clouds. I'll have to check the stores to see what they even have.

Is 20 gallons enough for a single paradise fish?

I've not seen celestial pearl danios in town but I have seen leopard danios. Can they go in colder water?
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Old 11-08-2019, 02:34 PM   #5
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Thanks Bbradbury but I was kind of hoping for something other than just typical white clouds. I'll have to check the stores to see what they even have.

Is 20 gallons enough for a single paradise fish?

I've not seen celestial pearl danios in town but I have seen leopard danios. Can they go in colder water?
Order from the Wetspot out of Oregon. They're excellent in how they ship fish.

Were you asking if CPD's are cold water? Leopards are cold water as well
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Old 11-08-2019, 03:11 PM   #6
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I'm in Canada. I can ask a local store if they can order them in.
I was asking if danios in general were coldwater fish. I have seen leopard danios here (rarely) so I know I can get them.
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Old 11-08-2019, 06:15 PM   #7
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Ahh that's right. Sorry about that.

I know CPD's are from experience. Leopards are too. Not a big danios fan so I don't know what every one of them need.
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Old 11-08-2019, 06:25 PM   #8
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No problem, I know the majority of users on this site are probably american.

Ill check with the store when i go out next to see if they can order any fish that they don't usually carry. I've never bought fish online so i'm kind of hesitant on doing that.
I think i'm going to narrow my search to minnows and species of danios for now. Unless the store mentions something i haven't thought of.

Are gold barbs cold water for sure (the internet is full of contradictions) and can i keep like 5-6 in 20 gallons or do they get too big?
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Old 11-08-2019, 06:43 PM   #9
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Aww yes gold Barb's. Yes they can be kept in colder water. 6 sounds about right for a 20g.
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Old 11-08-2019, 06:45 PM   #10
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Awesome i'll look into those as well.
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Old 11-08-2019, 09:13 PM   #11
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What temp do you think your water will run at?
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Old 11-08-2019, 09:15 PM   #12
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It's in the same room as my birds so I doubt it will drop less than 72 f.
Unless there's a power outage, it might drop to 68
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Old 11-08-2019, 09:16 PM   #13
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Ya those fish will be perfectly fine
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Old 11-10-2019, 07:32 AM   #14
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Any plant suggestions? Will have ferns grow in coldwater? What about some shorter plants. I'm going for a garden style aquascape so I want to get a variety.
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Old Yesterday, 01:50 AM   #15
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Meteor Minnows I think are the long fin more colorfully bred WCMM.
https://www.fishkeepingworld.com/whi...railing%20fins.

Plants like Dwarf hair grass does just fine, mosses, Subwassertang, Riccia fluitans and the Bolbitis fern. Java Fern and narrow leaf JF is very pretty. All those have grown just fine in a normal to cool room no heat. Many commonly found Crypts also.
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Old Yesterday, 02:23 AM   #16
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I'm pretty sure just about any common aquarium plant will live in water in the 70's.
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Old Yesterday, 07:10 AM   #17
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Thank you
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