Switching to 20g Tank...Help! - Tropical Fish Keeping - Aquarium fish care and resources

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post #1 of 25 Old 08-31-2011, 07:42 AM Thread Starter
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Switching to 20g Tank...Help!

Hello....

I currently have a 10 gallon tank and I just got a 20 gallon and would like to switch my community to the larger tank. I was wondering the best way to go about this. My filter currently does up to 35 gallons.

I'm not sure about my heater though, how would I know if it can sufficiently heat 20 gallons?

Also if I am using everything the same except the gravel, do I need to run the tank for a couple weeks before putting any fish in?


Also, once everythingis up and running I'd love some advice on what I can put, what would be good species for this tank. Last time I trusted the pet shop owner for my 10 gallon tank's inhabitants....big mistake!

so here is what I have already: 1 silver dollar, 2 bronze corys, 2 swordtails, 1 siamese algae eater

I would love to get another silver dollar, or even two to keep the other guy company. I've had him for a year but I learned they are schooling fish so I want to get him some tank mates of his own species if possible. Other than that, what are some of my options for additions to the tank, if any?
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post #2 of 25 Old 08-31-2011, 07:46 AM
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if you transfer the same filter material and some of the water you should be fine. i recently redid my tank with all new water, rinsed substrate, and the same filter and had no issues, though i did go two or three weeks with just two fish in a 29 gal. i'd say test your water every few days for a while to make sure nothing happens and do extra water changes if anything seems to look bad and you should be fine.
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post #3 of 25 Old 08-31-2011, 09:15 AM Thread Starter
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Thanks, I was thinking to fill about 25% of the tank with old water should that be sufficient?

I also have the Tetra AquaSafe and Nitraban that I usually put into the water is this the best option even for a larger tank? for my 10 gal. it always worked great to keep the water healthy.
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post #4 of 25 Old 08-31-2011, 09:28 AM
The bacteria associated with N2 cycling is not free floating but attached to hardscape, especially in filters. Transfering water is a pointless exercise. You would be better off to transfer the gravel. If you have chosen a new gravel or substrate type, put some gravel in a mesh bag or nylon stocking and drop or suspend in a back corner for a week or two.
As for stocking, there is good information here under 'Tropical Fish Profiles' that will tell you about compatibility. It may seem natural when you upgrade to a bigger tank, to get more fish. Resist this urge until the new tank is stabilized.

Good luck

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post #5 of 25 Old 08-31-2011, 09:29 AM
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Silver Dollar get quite large, about 6". Having those in a 10g or even a 20g isn't really fair to the fish. They should be in a 55g+ tank.

Yeah I agree with Lex, using the same stuff it shouldn't be an issue. Just remember to check it often just in case :)
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post #6 of 25 Old 08-31-2011, 10:13 AM Thread Starter
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Hmm, I was hoping the 20 would be a good improvement for the silver dollar.

That fish was one of the issues with the pet shop I went to, they told me he'd be fine in a 10 gallon which I later found out is a total lie. Since then I've tried to give him away to friends with larger tanks, but they all have agressive fish that would probably eat him.

At the moment I don't have a way to get rid of the silver dollar, what's the best things I can do for him in a 20 gallon tank?



Okay thanks, I do plan on buying some new gravel not too much, majority should be old gravel. I'll clean it up and find a bag to put it in the tank. Thanks AbbeysDad!
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post #7 of 25 Old 08-31-2011, 10:40 AM
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Hmm, I was hoping the 20 would be a good improvement for the silver dollar.
Okay thanks, I do plan on buying some new gravel not too much, majority should be old gravel. I'll clean it up and find a bag to put it in the tank. Thanks AbbeysDad!
If you were going to use the existing gravel, that's great, no need to do as I suggested. Just be sure you don't 'clean' the old gravel with chlorinated water

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post #8 of 25 Old 08-31-2011, 10:51 AM Thread Starter
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Okay, I will be buying a small bag since I won't have enough to cover the bottom of the 20g., so if it's just a small amount I shouldn't need to place it in the 10g. for a couple weeks?
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post #9 of 25 Old 08-31-2011, 11:39 AM
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On the "cycling" issue I agree with what has been posted. Move the filter "as is" (no rinsing/cleaning) and as much hard decor (wood, rock, ornaments) as you can without washing, keep them wet in tank water if you need to, or just move them from tank 10 to tank 20. No point in using old water, though if the parameters between the 10g and the tap water in the 20g are significant, this can help.

To the fish. Will the store take back the Silver Dollar and the Chinese Algae Eater? Both fish are unsuitable. The latter can get very nasty and is not a good community fish. The SD needs a group and thus a much larger tank. You can read more in our fish profiles, click the shaded names to see the profile for that fish.

I realize you've had the SD for a year, but if you explain that you need a group and don't have the space, they may take it. Or another store may. If they want your business they should be willing to help.

Byron.

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Vancouver, BC, Canada

The aquarist is one who must learn the ways of the biologist, the chemist, and the veterinarian. [unknown source]

Something we all need to remember: The fish you've acquired was quite happy not being owned by you, minding its own business. If you’re going to take it under your wing then you’re responsible for it. Every aspect of its life is under your control, from water quality and temperature to swimming space. [Nathan Hill in PFK]
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post #10 of 25 Old 08-31-2011, 12:11 PM Thread Starter
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I pulled this from the site fish profile: Generally peaceful, suitable for the larger community aquarium with other peaceful fishes such as barbs, danios and most loaches.

Read more: Siamese Algae Eater (Crossocheilus langei) Profile


Is the problem that I have swordtails, corys etc? So far the SAE seems to get along fine with its tank mates and that's in a smaller space.

Hmmm, I'll have to look into the local stores and see if they take back fish etc. If not, and I have no where to bring either of these fish....what is the best thing I can do within the 20gal tank? Is there anything I can do extra to make it a better environment until I find suitable homes?
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