1200 liter ? - The Planted Tank Forum
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post #1 of 5 (permalink) Old 04-14-2007, 07:37 PM Thread Starter
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1200 liter ?

I am new to the forum, and would like to ask you a little bit help in search of specific information.

I have a 400 liter tank, wet/dry 2 x 150 MHI Osram D 6500 K , CO2 cannister and a diy reactor. But after three years, i would like to go to the next level, that is : i am dreaming of a big tank, say 1200 liter. Could you point me out to some threads that deal specifically on large planted aquaria ? This forum is so huuuuge, difficult to find that info.
Thanks in advance.
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post #2 of 5 (permalink) Old 04-14-2007, 07:48 PM
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First of all, welcome to the forum
Second, 1200litre that is equivalent of about 275 gallon since you are running a tank already. Things should not be that much different actually it should be easier considering the size. Regards, jC.
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post #3 of 5 (permalink) Old 04-15-2007, 09:05 AM Thread Starter
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What I have in mind is an open top aquarium, in 19 mm starphire glas (front, left and right), absolutely NO bracing in the aquarium (yes, the real DUPLA style ) with two overflow boxes in the corners. I am going to see if its possible to have the glas thermo-hardened, after drilling of course. Should be possible, although costly i think
Dimensions should be 210 cm x 95 x 65 (maybe 70)
The filter will no doubt be a wet/dry.

But i think it will not be easy to achieve enough circulation within the tank, i plan on a heavily planted tank, dutch style. I am almost certain that only the two return lines from the trickle filter will not be enough. (on my 400 liter i would have liked also two return lines, should have insisted when i ordered it...)
Using powerheads is an option, but i do not like too much hardware that is visible, and its not easy to hide those pumps.

I have been reading much lately on the reefcentral forum, there are fantastic examples of 250 to 400 gallon aquaria, with hardly no powerheads visible. They achieve this by drilling the bottom in left front and right corners for two return lines extra on the bottom, or multiple drillings (4 to 8) for closed loop systems with external pumps dedicated to only this task.

The needed flow rates in a reef aquarium are of course by far superior to the needed flow on a planted tank. But still, i would like to ask your opinion, or maybe even practical knowledge just which of these techniques could be applied to a large planted tank.
A not to strong, but steady flow in every part of the aquarium is the goal.
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post #4 of 5 (permalink) Old 04-18-2007, 08:09 PM Thread Starter
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Nobody practical knowledge of closed loop systems on freshwater aquaria ?
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post #5 of 5 (permalink) Old 04-18-2007, 11:09 PM
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I do.

I'd suggest using external over flows instead of wasting tank space. A slot is cut into the tank's back or side glass for the water to go through.

Outside the tank is the overflow box.

I'd suggest a venturi 3/4" with a 600-700gph flow rate fed directly into the return suction side of the the main pump.

I'd also suggest a pair of good sized Rhinox diffusers(say the 5000's) as well. So you will need 3 needle valves.

You may want to drill two holes into the bottom of the tank for a 3/4 and a 1" size bulkhead.

One will be a closed loop for a large Ehiem filter, say a 2260, the other will be for a drain valve to do water changes easily and quickly.

Seal the wet/dry chamber where the bioballs are with duct tape to prevent gas exchange.

Use those lok line tubing for return water or, add bulk head holes and plumb them into the wall or bottom of the tank etc.

You might need thicker glass also for this sized tank, 22mm etc.

I'd consider an AM HQI 72" light, say 3x150w and 2x 70w.

You really do not need internal powerheads inside the tank.

Tom Barr

Tom Barr

Tom Barr
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