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PostPosted: May 5th, '13, 21:45 
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I have limited space on my balcony and i want to maximize the grow bed area which I plan to be
32" wide X 60" long.

I like the concept of Constant Level in the fish Tank but I don't want to sacrifice grow bed space to accommodate a fish tank with water level above the grow bed. So I came up with the concept of having the fish tank AND the sump tank all under the grow bed and pumping water to the grow bed directly from the sump tank.

Has anyone done this?
Are there any major obstacles to this system?


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PostPosted: May 5th, '13, 21:53 
If you got rid of the sump tank... and used the space for a bigger fish tank....

Then you wouldn't have to worry about the fluctuating level in the fish tank....

And would have fish tank capacity to expand... with more grow beds.... (and possibly a sump)... later on... :wink:


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PostPosted: May 5th, '13, 23:17 
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Tanks for your input, I would still be concerned about the large variation of the fish tank level being such a small system. (75 gal fish tank) I might have to go bigger fish tank AND sump


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PostPosted: May 6th, '13, 06:48 
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No sump?... That means pump in the fish tank! (risky and noisy for the fish)
Pump off the bottom in the FT? .... And u have solid build up on the bottom!

Keep the sump, u can use it for restock fingerling or poly culture system. And as a base solution addition tank(buffers+ alkaly)

I like it as it is, if GB space is an issue add a frame and you can have hanging basket drip system or vertical tower


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PostPosted: May 6th, '13, 07:14 
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There is no problems with having a pump in the FT... the water returning from the GB would be making more noise than the pump ever could.

Another option would be to get rid of the sump and the syphon and run it constant flooded and keep a constant water hieght in the FT.

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PostPosted: May 6th, '13, 07:36 
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All the BYAP systems have no sump!

I agree, ditch the sump.


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PostPosted: May 6th, '13, 08:55 
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If you want a steady height of water in the FT, then ditch the siphon and run the system constantly flooded; then you can get rid of the ST and have a larger FT with simplified plumbing (less risks). Don't worry about having a pump in the FT, it's not noisy for the fish and if there was any electrical fault with the pump the entire system becomes electrified anyway, and a well designed system will collect all the wastes from the floor of the FT for processing in the GB/filters.

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PostPosted: May 6th, '13, 09:00 
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Yep, get rid of the sump tank, absolutely pointless in a system this size, it just wastes space and overcomplicates things.. There's no problem with having the pump in the fish tank, and no problem with the very slight change in water level you will get in the fish tank...

edit, yeah, as bunson says..

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PostPosted: May 6th, '13, 15:16 
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Yea....run another CF system with poor harvest and lack of GB oxigenation(BYAP EXPERIMENT)
And... run the risk of pumping dry your FT.
Sure more fish ... Small GB = more NH4 & No2
Good luck!

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PostPosted: May 6th, '13, 15:28 
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Is that sarcasm?

The BYAP experiment showed no major difference between the 3 systems.
If you raise your water pump there is no risk of pumping dry.

And no one mentioned for fish, only more capacity to expand?

Considering the number of systems sold by BYAP using no sump that work perfectly, your argument seems flawed.


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PostPosted: May 6th, '13, 15:51 
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SARCASM....not at all, that refers just average humanoid behave!
Werdna, you might wanna go back to look at the last few post of the final harvest in that experiment (established system)
If you would have read the firs line of his thread ( LIMITED BALCONY CAPACITY!).....all pointless posting about expansion!

....unless he use the neighbour's balcony too!


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PostPosted: May 6th, '13, 15:58 
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I have no sumps on my balcony

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PostPosted: May 6th, '13, 17:07 
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What is the point of a bigger fish tank if you do not add more fish? and adding more fish mean more GB space or external filtration, which could be incorporated in the sump anyway.

bigger fish tank understocked is like have a MOET CHANDON dilute with water!

FL -Mitch; what is the maximum load for your balcony, or have you calculated haw much weight is the system going to be?


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PostPosted: May 6th, '13, 18:04 
bioaquafarm wrote:
What is the point of a bigger fish tank if you do not add more fish?

Perhaps you could explain the relationship of tank size... to numbers of fish (stocking density)... :wink:


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PostPosted: May 6th, '13, 18:07 
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More water = more stability.
The same amount of a toxin (say ammonia) does more damage in a small tank than a big one.


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