New to TFK and looking for ideas for 120l
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New to TFK and looking for ideas for 120l

This is a discussion on New to TFK and looking for ideas for 120l within the Beginner Freshwater Aquarium forums, part of the Freshwater Fish and Aquariums category; --> [IMG]file:///C:/Users/FAMDAM%7E1/AppData/Local/Temp/moz-screenshot-1.png[/IMG][IMG]file:///C:/Users/FAMDAM%7E1/AppData/Local/Temp/moz-screenshot-2.png[/IMG]Hi all I currently have a 120 l aquarium that i bought about 15 months ago I currently have the following fish inside: 1x ...

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New to TFK and looking for ideas for 120l
Old 06-07-2010, 01:22 PM   #1
 
New to TFK and looking for ideas for 120l

[IMG]file:///C:/Users/FAMDAM%7E1/AppData/Local/Temp/moz-screenshot-1.png[/IMG][IMG]file:///C:/Users/FAMDAM%7E1/AppData/Local/Temp/moz-screenshot-2.png[/IMG]Hi all

I currently have a 120 l aquarium that i bought about 15 months ago

I currently have the following fish inside:

1x Black Ghost Knife (My pride and joy)
1x Ansistrus
6x Silver tips
8x Golden Barbs (3x adults, 5x juvenile)
1x Pearl gourami

my old light setup was

2x 10 000k white lights
2x normal blue
1x normal white

My new light setup after much help from Byron

1x 10 000k white
1x Normal blue
1x Normal white

I have a Tetra tech 600 canister filter with a Sera diffusion kit.

I have also recently added new plants.

My tank with the old light setup:
100_1108.jpg
and with the new light setup and plants:
100_1118.jpg

i put the silk plants at the top as i cant get floating live plants here in SA, as its illegal.
The reason i put it there is because Byron informed me that the black ghost knife stresses under heavy light, no thanks to my local shop...

Any comments, and ideas on what to do with the tank next will be greatly appreciated

Andrew
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Old 06-07-2010, 01:48 PM   #2
 
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Do you plan on upgrading tanks when the knife fish gets bigger? They do get somewhat large. I'm tempted to say that your tank is pretty much at capacity unless you only plan on increasing the size of your existing shoals or only getting a small size (6 inches or under) center piece fish. One suggestion would be an angel fish.
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Old 06-07-2010, 01:50 PM   #3
 
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To start this off, and so others are aware of what I've already suggested to Andrew in my response to his PM:

Andrew understands that the knifefish needs more tank space and that is planned. I suggested darkening the tank considerably (the removal of some of the lights), and suggested different lights to improve the plant growth. Also using a liquid fertilizer (Flourish as it happens), so this is also in the works. I recommended removing the gourami and the barbs; this because angelfish are being contemplated for the larger tank with the knifefish and I consider the barbs too active for both knifefish and angels and the gourami is rather "out of place." Both angels and knifefish appreciate very subdued lighting, and in the larger tank some additional characins (tetra species) that are compatible will work.

Something I hadn't known before though is the white substrate. I would certainly consider replacing this, or at any rate plan for a dark substrate in the larger tank. A white or light-toned substrate reflects a considerable amount of light, and these fish are not accustomed to light substrates and will always be less "comfortable" over white. Dr. Weitzman and others have gone into this with scientific studies, I don't need to go into all that. A black, dark brown, or dark gray mix will suit all these fish perfectly.

On the light, in my view it needs further reduction. I have a comparable sized aquarium (120 litre is approx 32 US gallons, I have a 33g shown below) with one 20w full spectrum Life-Glo 2 over it, and it is more than enough for the plants. The photo is what is looks like today; the plants are thriving, the fish are happy to have shaded areas (the fish in this tank are 12 Nannobrycon lacortei, the rainbow emperor tetra). Andrew has CO2 diffusion, so two tubes max might be needed to balance, but I would suggest one of the three certainly needs to go.

A comment on the plants in this tank, they are all daughter plants culled from my other tanks (the 115g and 90g Amazonian aquascapes and the 70g SE Asian aquascape) so they are in this tank simply to avoid throwing them out. I use them to replace "old" plants in the other tanks, so there is some periodic change-over but these plants have been in there for about 2 months now.

Byron.
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AndrewSeath (06-07-2010)
Old 06-07-2010, 02:04 PM   #4
 
Hi all

Thanks Byron for explaining it all, as i was not sure of how to phrase it all. As he said, i am planning on getting a larger tank, probably around 180-200 liters. I will also be darkening the tank further by possibly taking out the 10 000k light (what do you think?). i will also change the gravel, or do some aquascaping using mostly a darker gravel.

I will have better photos of the tank tomorrow, and an update to what i will be doing to darken the tank.

Your tank is beautiful Byron, i hope mine will look just as full and natural as this one.

Thanks for the input.

Andrew

Last edited by AndrewSeath; 06-07-2010 at 02:06 PM..
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Old 06-08-2010, 03:03 AM   #5
 
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The one suggestion I do have in addition to what Byron brought up is that you keep the gourami and barbs for this current tank and move the others over to the larger tank once you get it. The barbs and gourami can live in this tank permanently, plus that way you'd have your fish segregated into SE Asian and Amazonian biotopes, which is something a lot of people like to do for a number of reasons. A nice group of barbs, the gourami as a centerpiece fish, maybe some rasboras, and a nice group of smaller loaches for the bottom would make for a really nice SE Asian tank.
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Old 06-08-2010, 05:21 AM   #6
 
Hey Iamntbatman

thanks for the suggestion, it is something to consider, but not at the moment. i will however keep it in mind, and maybe towards the end of the year i will have had saved enough money to do this.

One more question, will a 200 liter tank be big enough for the knife fish.

Thanks
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Old 06-08-2010, 08:15 AM   #7
 
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Honestly, no. But the recommended size for him is probably way out of the question. My LFS strongly suggests 300G or about 1100L for those fish. (Weird) BUT they say it will do okay in a 120G (460 L) tank provided it has the right plants, substrate, lighting, and tank mates.
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Old 06-08-2010, 09:09 AM   #8
 
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There is a good article on knifefish in the May 2010 issue of Aquarium Fish International, written by Jeff Howe who has degrees in biology and marine biology , has worked at the Smithsonian Institute, and is now a Fish biologist in Florida. He notes that this species attains 20-24 inches and initially will manage in 30g but soon requires a tank of 200-300 gallons to develop properly. He mentions keeping any metal objects away from the aquarium, as these will interfere with the fish's sensory electroreceptors.
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Old 06-08-2010, 09:11 AM   #9
 
Wow, Haha, guess ill be having three tanks by the end of next year then, haha, but for now, he only like 10-12 cm long(+-4 inches) so i think it will be ok, and then when he gets too big for it, ill buy him a 500l tank.

Isnt it amazing what some people will do for their fish.

Thanks for the info.
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Old 06-08-2010, 09:53 AM   #10
 
Quote:
Originally Posted by Byron View Post
There is a good article on knifefish in the May 2010 issue of Aquarium Fish International, written by Jeff Howe who has degrees in biology and marine biology , has worked at the Smithsonian Institute, and is now a Fish biologist in Florida. He notes that this species attains 20-24 inches and initially will manage in 30g but soon requires a tank of 200-300 gallons to develop properly. He mentions keeping any metal objects away from the aquarium, as these will interfere with the fish's sensory electroreceptors.
Hi Byron, That sounds like a good article to read, as my ghost knife is my main attraction, i will definitely be on the look out for this article.
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