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 Post subject: Pump and drain positions
PostPosted: Jun 3rd, '14, 17:08 
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I have a BYAP courtyard system with trout at the moment and I am struggling to keep the water quality right.
At the moment, ammonia is 0.5, Nitrite is 0.25-0.5, Nitrate is about 80.
I am having to scoop waste and sunken pellets from the tank every day.
The pump is located at the back of the tank and the drain is to the right of it, pointing away from the pump (water flowing clockwise in the tank)
The waste is at the front of the tank. Is this a common problem?
I don't think I am over feeding the fish. At the moment I feed once a day and until they lose interest and no pellets left.
Hopefully this diagram helps
Image

It is run 15/45 at the moment but I am tempted to swap over to constant flood. Seem to be able to maintain better water this way.
Should I face the drain at the pump? Move the pump?

Cheers
Rob

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PostPosted: Jun 3rd, '14, 17:22 
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Hi Rob. I'm not sure that you can do too much in the way of rectifying the waste situation in the system design that you currently have. Not without adding a SLO from the FT to the GB. Such an addition would require a system design overhaul. Such as a CHIFT PIST.
The system you have generally works well for the small scale regardless of the waste issue though.

How many fish do you have in your FT?


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PostPosted: Jun 3rd, '14, 17:28 
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There are 25 trout and 7 silver perch in there at the moment.

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PostPosted: Jun 3rd, '14, 17:37 
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Ok, how big are they? Also how many Litres of media do you have in the GB?


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PostPosted: Jun 3rd, '14, 17:43 
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Maybe 80g trout and silvers are in between 20 and 35cm.

I think it is 500L grow bed.

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PostPosted: Jun 3rd, '14, 17:48 
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The BYAP (cheidy) beds are 500L, Matt.

I had similar issues with my round tank so I used an old pond pump to swirl the water in the tank, I also incorporated a Venturi in the output for addition water agitation. This way all the wastes moved to the centre where I located the pump.

One thing to remember is trout are messy, they eat and poop a lot so don't get too fussy with stuff on the bottom of the tank, it doesn't really cause issues and eventually gets to the pump from fish swimming around.

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PostPosted: Jun 3rd, '14, 17:55 
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In order to get your fish healthily to plate size the recommended GB (Wet Media) to Fish ratio is 20L per fish. That would max your system out at around 25 Fish. It's quite possible that you have too many fish in your system providing too much ammonia.


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PostPosted: Jun 3rd, '14, 18:11 
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The silver perch aren't eating a hell of a lot and some will come out soon for a meal.
With the trout the size they are, I don't see an overstocking problem at the moment.
I am looking into a second growbed now. Just deciding whether to go media filled or DWC

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PostPosted: Jun 3rd, '14, 18:15 
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Ok cool. Would you be adding the DWC above your FT?


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PostPosted: Jun 3rd, '14, 18:16 
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Charlie wrote:
The BYAP (cheidy) beds are 500L, Matt.

I had similar issues with my round tank so I used an old pond pump to swirl the water in the tank, I also incorporated a Venturi in the output for addition water agitation. This way all the wastes moved to the centre where I located the pump.

One thing to remember is trout are messy, they eat and poop a lot so don't get too fussy with stuff on the bottom of the tank, it doesn't really cause issues and eventually gets to the pump from fish swimming around.



This.

Get a constant swirl going (the trout will appreciate it too) and move the pump to the middle, the swirl doesnt have to be really fast, when the fish disturb the waste the swirl will then help move it more if it is fsst enough.
changing to constant flood will be the cheapest way to do this - if your pump is good enough to create swirl in the first place.


Last edited by Yavimaya on Jun 3rd, '14, 18:19, edited 1 time in total.

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PostPosted: Jun 3rd, '14, 18:19 
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+1

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PostPosted: Jun 3rd, '14, 18:24 
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Matthew Russell wrote:
Ok cool. Would you be adding the DWC above your FT?

I have about 2.2m at the back to use. Thinking of adding a smaller media filled bed to act as a filter which flows into a 2m x 1.2m DWC/Raft growbed which drains to fish tank.
Still in planning stages whether to go this way or just add another large media bed.

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PostPosted: Jun 3rd, '14, 18:35 
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Awesome mate. Look forward to seeing the upgrade. Make sure you add some pics :)


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PostPosted: Jun 3rd, '14, 18:43 
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Eat the silvers...... :eat:

Your trout will take over as there are too many fish really..

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PostPosted: Jun 3rd, '14, 18:45 
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Yea I will be taking a couple of silvers out soon. Maybe this weekend.
Never eaten them before so will be interesting.
If they are anything like Redfin they will make a tasty dinner.

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