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This is a discussion on Challenge for all within the Beginner Freshwater Aquarium forums, part of the Freshwater Fish and Aquariums category; --> Fast water would bo doable even with the one tank. Could use the main pump to provide the flow with a rock barrier to ...

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Old 01-16-2013, 09:17 AM   #11
 
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Fast water would bo doable even with the one tank. Could use the main pump to provide the flow with a rock barrier to create a more still "pool". Use a 2nd pump lower down with a spray bar to have a good circulation. I like the idea of this, fast and still water in the same tank
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Old 01-16-2013, 10:00 AM   #12
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Fast water would bo doable even with the one tank. Could use the main pump to provide the flow with a rock barrier to create a more still "pool". Use a 2nd pump lower down with a spray bar to have a good circulation. I like the idea of this, fast and still water in the same tank
I was trying to scale it down in my head... you are right, as long as the tank is wide enough (front to back) and the rock wall is narrow enough it could be made to work. With the rocks in the fast water section taking up volume and a mostly flat bottom on the backside with a wider cross section the GPM flow per side should work out... bit of math needed and perhaps a little trial and error in a test mockup to get the flow and still water needed.

The main pump at the "top" of the fast water, the intake at the bottom. I am picturing rapids but I think that is too ambitious. Although blasting a powerhead at a midflow rock could create all the agitation that you need without wasting water flow on a spraybar.

The only issue might be coming up with fish that would inhabit both sides by choice. I think crustaceans would do well on the rocky side, get some hair algae growing and flowing on the rocks with something like giant vallisneria flowing as well. Catfish on the still side with a sand substrate... leaves and wood debris with some sprinkling of river rocks. Cool water, not your typical tropical though, that will help keep the evaporation to a minimum and boost the plant growth somewhat.

The really interesting part is that you could do this with no filtration. At the "bottom" of the fast section you have a mass of plants that both slow down the water and snag suspended particulate. Might be too much of an experimental setup to try first time out but interesting.

Jeff.
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Old 01-16-2013, 10:51 AM   #13
 
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The tank i have is 2ft wide so witdh wouldnt be a problem, maybe some cichilids might like it, a 200ltr an hour filter without a spray bar would produce enough of a current, as said below a smaller fileter of maybe 1000lph with a spray bar would complete the circulation. The only problem i can think of for a strong current is the wave you would surely get, being only 4ft long it soon build up
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Old 01-16-2013, 11:30 AM   #14
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The tank i have is 2ft wide so witdh wouldnt be a problem, maybe some cichilids might like it, a 200ltr an hour filter without a spray bar would produce enough of a current, as said below a smaller fileter of maybe 1000lph with a spray bar would complete the circulation. The only problem i can think of for a strong current is the wave you would surely get, being only 4ft long it soon build up
Wave? you can't generate much of a wave on the end wall, which is partly why I suggested the midstream rock blast... puts any wave in the middle and slows down the current toward the end anyway.

I don't think that 2' is wide enough, the sections would be too small... 36" would be better and square better yet... but you already have a tank. What you will end up with will basically be a large swirl and you won't have a stillwater area, not enough width to let the flow slow down in a wider area so the effect will not be fast water/slow water divided. You won't be happy with the result.

Having said that, perhaps a split is still a good idea, go side by side instead, skip the fast water idea and create a rocky side and sand side with a variety of plants and vertical flat rocks to provide a visual and ecological division. On the rock side you could go with a small waterfall (just flow some water over the rocks, not really a waterfall, that might get too annoying to listen to) and a scattering of grass like plants between the rocks, on the sand side, surface plants, stems and carpet plants, maybe some wood. Similar idea with the fish but you don't need to deal with fast water fish... just rock preferring and sand preferring.

The downside is that you would have to consider each side as the "tank size" when considering fish even though the bioloading is for the tank as a whole which may limit you to slightly smaller fish than you may have preferred with a wide open tank. The upside, more fish overall.

Jeff.

Last edited by JDM; 01-16-2013 at 11:32 AM..
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Old 01-16-2013, 11:45 AM   #15
 
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If you went multi levelled.....like Jeff said with the rocks..... blasted the water down the side(vertically positioned prop?) Into the rocks..... then across the tank at say 10 inches high.....then on the other side of the tank... have a drop off into a 2" sand bottom you would no doubt get a stillish water area there which would provided a contrast.
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Old 01-16-2013, 12:07 PM   #16
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If you went multi levelled.....like Jeff said with the rocks..... blasted the water down the side(vertically positioned prop?) Into the rocks..... then across the tank at say 10 inches high.....then on the other side of the tank... have a drop off into a 2" sand bottom you would no doubt get a stillish water area there which would provided a contrast.
Hmmm... I wasn't actually thinking multi level as that implies a solid division and it would be hard to make the divider not look like a glued in divider... and the lower water level would leave it's visible marks on the glass from evaporation and sediment but I like the idea of multi level. That could be made to work on a much smaller scale too.

I think there is benefit in allowing fish to go back and forth but a hard divider does let you have non-compatible fish on either side.

For a divider I might try a cut rock so the cut edge is against the glass. It wouldn't have to be glued as the water is flowing, just tight. It would look sort of cool just like seeing the edge of the sand as if it were cutaway, the rock appears cut away. On second thought it might be a nasty place for algae to build up in though... best to seal it up with a really good clear silicon.

Just having the intake on the lower side and the output on the upper side looks after the flow and with the relatively high flow rate given the half size of the high side there would be moving water easily enough.

Jeff.
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