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Old 05-21-2010, 08:35 PM   #1 (permalink)
CL
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Arrow SE Asia Biotope: 33.6G Rimless Iwagumi Rapids

Picked up some stones today. ~50 pounds (probably more) for $12. Not bad.
I've wanted a rapids-esque tank for a while now.

I could do an Asian stream biotope
Biotope Aquariums Asian River
a southern thailand Forest creek biotope (the one listed as "Rocky Rapids")
Biotope -- Southern Thailand Forest Creek
or an Indian river biotope Biotope Aquariums

I'm ordering an MP 10 wavemaker/ powerhead this week. I've wanted one for a while now, and I'm finally paying up the large amount of money for one (considering it's a powerhead), but the wave feature is something I really want in this tank.

The water will have high oxygen levels, no CO2 injection, and minimal plants, which will most likely include crypts and some willow leaf hygro (depending on which biotope I chose)

I will be buying a 33.6 gallon rimless tank I've yet to decide on substrate, but it will most likely be a coarse beige sand (any recommendations/ links?)
The light will be a 70 watt FNI MH thats a couple of feet above the tank. I want a crisp look, with crystal clear water haha.
Here's the scape that I put together:






I'll most likely have the waterline two or three inches below the rim. It's a deep tank, and I don't want to worry about water sloshing over the edge.

Plants: Plants will be crypts. Maybe some other SE Asia plant. All of the plants and fish will be natives of Vietnam/ Southeast China. I know that blyxa japonica comes from this region, and I think that it would look awesome with my scape, but it comes from marshes, and not high flow streams. Maybe I could do the blyxa anyway... at least it's from the same region.

Fish:
I have almost completely made up my mind on what fish to get. I'll be keeping white clouds and Reticulated hillstream loaches, along with some kind of shrimp (most likely cbs, since they are native to SE asia, and I already have a bunch).
This is a very cool white cloud mountain minnow biotope tank (southeast asia) YouTube - White Cloud Mountain Minnow Biotope


Shrimp:
Here's some great information on CBS in the wild in Vietnam:


Bumble bee shrimp collecting trip (In Viet Nam) - AquaticQuotient.com

Wild type neocaridina heteropoda are also found in SE China/ Vietnam

http://www.myaquariumclub.com/neocar...uarium-90.html
These should be easy enough to "make". I've had a small colony of snowballs in my 40 breeder paludarium (no journal on here) with a couple of cherries. They have had plenty of babies, but no wild coloration has appeared yet. Instead, the cherries that are in there have become very pale in coloration, and it just looks like I have a colony of snowballs. Maybe I should add more cherries?


Flow:
The problem with comparing the flow in a tank to the flow in a river/ stream, is that flow in a stream is measured in ft/ sec, and not GPH.
Since one cubic foot of water is 7.48 gallons, and the MP10 (that I ordered a couple of hours ago btw) will be on one side of the tank, flowing the length of the tank, to find ft/ sec that 1600 GPH is, you need to determine how "long" one gallon of water is in the tank.
The tank is 17.5x17.5x24"
One cubic foot is 1728 cubic inches. Divide that by the width and height of the tank (17.5x17.5= 306.25 square inches) to get the dimensions of 7.48 gallons in the tank, and you get 17.5x17.5x5.64 inches. Divide that by 7.48, and you get that one gallon of water is 17.5x17.5x0.754 inches. Now you know that if you move one gallon of water/ hour, the water in the tank is moving at .754 inches/ hour. 1600 GPH is 0.754x1600= 1207 inches/ hour (in a tank with these dimensions). To get that into ft/ sec, divide it by 3600 seconds/hour, then divide it by 12 inches/foot, and you get 0.0279 ft/ second? (did I do this right?)

That isn't too much flow, but it is coming from a small(ish) point. vortechs do have very wide flow, but I wouldn't be using the full 17.5x17.5", considering the water does have to come back to the pump... however, if I have it on pulse mode, the flow would be closer to the 0.0279 ft/ second, or 1/3 inches per second that I calculated above. One inch of water flow every three seconds doesn't seem like much, but I guess I'll have to wait until I get the powerhead to see.

Lots of research still to do. What do you guys think?
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Old 05-21-2010, 08:51 PM   #2 (permalink)
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Do the feet go into the aquarium all so.
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Old 05-21-2010, 08:58 PM   #3 (permalink)
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Only when I want one of those fancy pedicures with those Chinese fish
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Old 05-21-2010, 10:51 PM   #4 (permalink)
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Consider this for a river/rapids biotope: River-Tank Manifold Design — Loaches Online

A neat little piece of hardware that could help you accomplish what you are setting out to do or at least give you more ideas.

I like the arrangement of the rocks, but consider this; Rocks in a stream usually line up with the current. Have you considered a more linear arrangement to compliment the flow and thus the biotope? Just a suggestion.

I have also kept hill stream loaches, namely Sewellia lineolata and they certainly are characters. Combine them with the White Clouds like I did and you have a dramatic mix that is also quite relaxing on the eyes at the same time.

Plant wise, not a lot enjoys rapids. Mosses, ferns or emmersed is really it. Maybe a large Cyperus species in the back? You could probably do that.

Please keep us posted. This is quite and exciting project you have going.
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Old 05-21-2010, 11:13 PM   #5 (permalink)
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Quote:
Originally Posted by ukamikazu View Post
Consider this for a river/rapids biotope: River-Tank Manifold Design — Loaches Online

A neat little piece of hardware that could help you accomplish what you are setting out to do or at least give you more ideas.

I like the arrangement of the rocks, but consider this; Rocks in a stream usually line up with the current. Have you considered a more linear arrangement to compliment the flow and thus the biotope? Just a suggestion.

I have also kept hill stream loaches, namely Sewellia lineolata and they certainly are characters. Combine them with the White Clouds like I did and you have a dramatic mix that is also quite relaxing on the eyes at the same time.

Plant wise, not a lot enjoys rapids. Mosses, ferns or emmersed is really it. Maybe a large Cyperus species in the back? You could probably do that.

Please keep us posted. This is quite and exciting project you have going.
I agree with every point you made, but with my tank, I guess I was going for more of a turbulent point in a stream, rather that a part where water flows in one direction. I have read that article, and another by the same author at least three times this week. Great stuff. I've always wanted to do a river manifold like that, but I don't think that the shape of this tank lends itself to such a layout. I'll have to wait until I get a longer tank to do the manifold, IMO.

The rocks in a stream definitely line up with the current, and it would look very natural in a tank with the manifold like what you talked about, but my tank will have more of a sloshing/ gyrating motion going on [video], plus I have wanted to play with one of these haha (though, I have wanted to use a manifold for longer, I've decided to go with this one first). Anyway, in an area with water going in every which way, like it often does in rapids (which is what makes them so dangerous), the rocks would appear in a random arrangement.

The whole idea with white clouds and Sewellia lineolata really fell into place. They both happen to be from the same general area, and while white clouds aren't from such turbulent waters as hillstream loaches, I think it's a nice compromise, plus they should have shelter in the plants if they ever need it.

Which leads me to the next point. You are right, plants aren't often found in rapids. Originally I had planned for no plants at all, but being the aquatic gardener that I am, it's hard to resist. This particular tank and scape might look best with no plants, iwagumi with just blyxa j. looks really great as well (I really wish I could find a thread that I read years ago on ptf that a guy from canada did on his tank that he had next to his dart frogs that was just an iwagumi scape loaded with blyxa and downoi. It was quite inspirational), and I had always wanted to try this with iwagumi, so when I looked up where blyxa was from, and I read SE asia, I almost had to do it. I might hold strong, though, and not add the blyxa, but then again, I could always add it for a while, then take it out if I don't like it

Thank you so much for the comments! That's exactly the kind of comment that I was looking for
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Old 05-21-2010, 11:20 PM   #6 (permalink)
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I have seen that very device in use in two of the planted display tanks in my favorite LFS! Now I get it!

I one tank they replicated an African rapid, but they planted it with lots of Anubias and hair grass and both seemed quite happy and vigorous even with all that motion but the sway looked very nice. The fish, Congo Tetras mostly, aren't even bothered in the slightest.

Of course, they didn't bother with CO2 in those tanks . Their aquascape was very close to what you're trying to do.

Exciting already! And this is just the start...
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Old 05-21-2010, 11:26 PM   #7 (permalink)
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Thanks! Congo river biotope was actually my original plan for this tank, but I felt like I needed a bigger tank to get the effect I wanted with congo tetras, so after more research, I decided on SE Asia.
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Old 05-22-2010, 02:57 PM   #8 (permalink)
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So, considering hillstream loaches literally climb waterfalls in their natural habitat, I'm going to need a lid, aren't I?
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Old 05-22-2010, 03:31 PM   #9 (permalink)
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Yup. I will say though, mine never tried to climb out, but I have seen footage of them doing it but I think it is in the context of an exodus, like escaping too warm waters or pollution.
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Old 05-24-2010, 11:36 PM   #10 (permalink)
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Hmm, I'm thinking that I want to buy another garden mat for this tank. I got one "used" for my 91L, and it feels awesome. I definitely feel confident putting that much of an investment on it, however, I would have to buy a mat for a 120P, then cut it in half for it to fit on this tank (60x45 cm, a 120P is 120x45)
GLA should carry garden mats! I know Orlando was thinking about it a while ago.
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