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Old 08-11-2004, 06:21 PM   #1
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Beginner considers 20 Gal. saltwater tank

I am a beginner and new to the site, but I have done a lot of research on salt water tanks. Of the 5 experts I have talked to, 2 of them do not recommend using a 20 gallon tank for saltwater. Before you comment, I can say that I am very scientific and diligent in terms of testing and maintenance. I intended to put a clown, a blue tang, a crab, a shrimp, and a couple of snails in there. I want to use crushed coral, an underfloor filter, a penguin 125, maybe add an anemone, and some fake coral. I have a heater, and I will buy a complete test kit. I will do a 20% water change every month, along with vaccuming and testing. Please advise if this is OK. I don't want to kill fish, but at the same time, I think many people in fish stores are very conservative with their rules of thumb. Keep in mind that I will probably go the freshwater route if too many of ya'll think that it won't work. Please advise.

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Old 08-11-2004, 06:35 PM   #2
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20 gallon is way too small for a Blue Tang. a 70 gallon or bigger is recommended.

being a Rookie to the hobby myself I wouldnt suggest a 20 gallon to start.

I suggest you go with a bigger set up.

72Gallon Bow Tank | LS/80lbs LR.com Keys LR 20Lbs Base Rock | fluval404 | Remora Skimmer | Red Sea Pro Wave Maker | 4 Maxi Jets 2/1200 2/900 PH | PinPoint PH Monitor | ARTICA 1/10 HP Chiller

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Old 08-11-2004, 06:45 PM   #3
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the main problem that you will experiance is not a problem maintaining your 20 gallon tank it will be not having enough room in the 20. soon it will be full to its max with life forms and you will get the urge to get more and youll be looking into a bigger tank. i had this problem with my 55 gallon and now im at a 125 gallon and still thinking bigger is better. if you can fight off this urge when it comes and stay satisfied with a 20 gallon go for it. ive seen some pretty nice small reef tanks. good luck with your choices and enjoy this hobby. be warned its werry addictive.
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Old 08-12-2004, 12:39 AM   #4
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i heard the same stuff u did ive kept freshwater tanks for a while and the only space i had in my room for a tank was a 16 gallon i did it as my first saltwater tank and it seems fine its working great so i say if ur ready for the commitment of it then go for it and hippo (blue) tangs grow very slow so if u get one about nickel size it will be good in that tank for a while just make sure u have a place for it to go when it gets too big because it will outgrow the tank in a year or 2 i know many people who have kept blue tangs in 20gallons for 1 - 2 years before they outgrew the tank goodluck and if u have any questions feel free to ask
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Old 08-12-2004, 12:03 PM   #5
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The blue tang will outgrow the tank...they need lots of swimming space. The undergravel filter will cause headaches go with either a power canister or HOB or even better LR with a skimmer. Do more research, research, research. I myself have a 20 gallon reef tank that I've been very happy with. Still, I'm counting the days until I can go 55 or even 100 gallons. Pick up a copy of "The Concientious Marine Aquarist" by Robert Fenner....its packed with great info for beginners. HTH
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Old 08-12-2004, 02:37 PM   #6
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Also on the blue tang you might consider the fact that even though they are small, a 20 gallon is not near big enough for it. It may even stress the fish to the point that it will be disease prone with regards to but not limited to HLLE or ick. Just my opinion. Also you can pick up a 55 gallon for not much $$ and use the 20 gallon as a sump...this would be a lot better if you insist on getting a tang.
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Old 08-12-2004, 03:14 PM   #7
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First, I greatly appreciate all of your expert advise. I tend to require thorough research and opinions before I make such an important decision. And I wanted to clarify that my requirement for the tang is totally out of my hands. I have a 2-1/2 year old daughter whose favorite movie is Finding Nemo. I have absolutely no power or self control in saying "no" to her. However, If my research and your opinions yield that a 20 gallon slatwater tank is a risky operation, or that the fish will be stressed or likely for disease, then I will go freshwater. If I go fresh water, the closest thing to a "Dory"/tang is a Demasoni Cichlid (see picture). Or, there is a freshwater parrotfish, I think that can be found in blue, but I haven't found any. As for Nemo, I would unfortunately have to go with a Koi gold fish. What I have learned, which makes me lean away from salt, is that about 15 lbs of live coral may make the fish live better, and that stuff is expensive. Please keep up the valuable advice.
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Old 08-12-2004, 03:53 PM   #8
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You won't be able to fool that kid. Even if you can - -do ya really want to??? As Arizona Reefer said, it's very addictive, and you (not your daughter) will want a bigger tank real soon. Keep the 20 for your quarantine. And even though you are very scientific and dilligent, it's a lot more work in my opinion to maintain a 20 since ambient temperature and ever so slight happennings with the inhabitants can alter the water a lot faster than in a larger tank.

P.S. - that looks nothing like Dory.

"Life may not be the party we hoped for but while we are here we might as well dance!"

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Old 08-12-2004, 04:22 PM   #9
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I just recently started a 20 gal sw tank back in Feb. There is definatly a part of me that wishes I had gone bigger. It has definatly limited me in my choices (and has saved me some money in regards to other areas). But I mainly wanted to have clownfish in my tank so it wasn't too bad.

Just think the decision through thoroughly before you jump into any decision. If you go with freshwater fish you could easily explain to your daughter that Nemo and Dory are in the ocean- like they tried to be at the end of the movie... And that Nemo and Merlin have sent their good friends *insert freshwater fish here* to keep your daughter company.
Marlin: Okay, a mollusk walks up to this sea cucumber, well he doesn't actually walk, he's just there, and he turns to the sea cucumber, and... Well, wait, there's a mollusk and a sea cucumber and...
Chum: You know for a clown fish, he's not that funny.
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Old 08-12-2004, 06:40 PM   #10
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Why not see if your daughter might be willing to meet you ½ way. A 20 gal tank would house two "Nemo's" quite well. I would just skip any idea of keeping an anemone in a tank that small.

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