New tank- which size is best?

I'm planning to get a new tank soon, but I'm not sure which is best. I'm looking at these ones:
36 gallon bow front (19"L x 30" W x 21" H)
45 gallon (13"L x 36" W x 24" H)
55 gallon (13" L x 48" W x 20" H)
(Note that I rounded to the nearest inch)

I am limited on space, which is why I was looking at doing a tall tank instead of high, but if need be I could make room for the 55.
I've heard that length and width are generally more important than height for most fish. Is this true? I'm not sure yet what I'd like to keep, but I was thinking goldfish, cichlids, or angels.

 

Angels break that rule, theygrow in height as they age. Stillid want the 55 for most cichlids.

 

Angels break that rule, theygrow in height as they age. Stillid want the 55 for most cichlids.

Okay, so probably the 36 or 45 for angels, and the 55 for goldfish or cichlids.

 

I recommend goldfish in the 55. Id say 3-4 fancy goldies would work well. Either bare bottom or sand for substrate. Plastic plants(or live anubias Amazon sword and java fern(these are the only plants my goldies haven't eaten yet)) and a large canister(turns over tank volume 20x per hour) if you go with goldies make sure you go with the fancy variety. Commons get to big.

 

I recommend goldfish in the 55. Id say 3-4 fancy goldies would work well. Either bare bottom or sand for substrate. Plastic plants(or live anubias Amazon sword and java fern(these are the only plants my goldies haven't eaten yet)) and a large canister(turns over tank volume 20x per hour) if you go with goldies make sure you go with the fancy variety. Commons get to big.

Okay. I was hoping to get goldies from dandy orandas if I went that route, and planning on the black diamond blasting sand and an Eheim filter. Would you recommend a heater to keep temps at a stable temperature, or no? With the goldfish I just rehomed, I didn't use a heater and noticed the temps fluctuated quite a bit.

 

A 75 gallon is a little wider than a 55 and has the same length.

If you want, you could go for one of those for goldfish. Because fancies get pretty big. My lfs had a full grown one on display so people understand before purchasing one and that fish is basically the basketball with a two tails.

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The bigger is better with Goldie's.

I have an Eheim Heater. Not sure on wattage. I'll have to check once I get home from school.

 

A 75 gallon is a little wider than a 55 and has the same length.

If you want, you could go for one of those for goldfish. Because fancies get pretty big. My lfs had a full grown one on display so people understand before purchasing one and that fish is basically the basketball with a two tails.

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I will look into a 75 gallon. I do only have 4 feet available in length, but could expand my width and height. I've seen adult goldies, and would hate to crowd mine. How many would you recommend for a 75? I was thinking 4 in the 55, so perhaps 5 or 6 in a 75? Are there any snails that can tolerate goldie temps and would get along well?

 

Also, with a tank that large- do I need to be concerned about my floor holding up to the weight? I plan to buy a stand specifically for the tank. It will be on the first floor of my house, but we do have a basement. I've never had a tank that size, so I don't know if weight needs to be taken into account.

 

I'd check with a house construction worker to come and inspect your supports and if it may or may not be an issue.

I'd still only do 4 Goldies in a 75 gallon. I think it's supposed to be 20 gallons per fish, so the 4 for a 75 would be pushing it a bit.

The best thing to do is research. Look at videos of full sized goldies and read articles, ect. They do get pretty big.



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I'd check with a house construction worker to come and inspect your supports and if it may or may not be an issue.

I'd still only do 4 Goldies in a 75 gallon. I think it's supposed to be 20 gallons per fish, so the 4 for a 75 would be pushing it a bit.

The best thing to do is research. Look at videos of full sized goldies and read articles, ect. They do get pretty big.



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Okay, thanks. I'll probably only start with 2-3 then.

 

You're welcome. Hope everything works out

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20 gallons for the first fish and 10 for the next until you get to 5. Than you start over. So in a 75 you could have 5-6 tops.

 

20 gallons for the first fish and 10 for the next until you get to 5. Than you start over. So in a 75 you could have 5-6 tops.

Okay, cool. I'd probably rather do less than more.

 

20 gallons for the first fish and 10 for the next until you get to 5. Than you start over. So in a 75 you could have 5-6 tops.

20 seems small, 10 more seems tiny; id go 30

 

20 seems small, 10 more seems tiny; id go 30

Are you saying 30 per fish, or 30 for the first, then 10 or 20 for additional?