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PostPosted: Aug 13th, '09, 21:43 
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Seriously, this cant be healthy.
Seriously, this cant be healthy.
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TCLynx wrote:
omek wrote:
i have this setup of AP and the water flow is continuous. is it ok?


We should perhaps take discussion about continuous flow to another thread. When you say continuous flow, do you mean......
trickle of water through the gravel and draining directly so the bed never floods?
or
Continually flooded?
Or
Continually pumping but the bed floods and drains by the use of a siphon or flout or something?

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PostPosted: Aug 13th, '09, 21:57 
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Seriously, this cant be healthy.
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Any one of those methods can work but some of them have their limitations.

Trickle might be fine for the plants but doesn't provide much bio-filtration for the volume of gravel so water quality may be a problem.

Continually flooded does work but again it may not bio-filter quite as well as flood and drain due to aeration issues and root rot is more of a problem in this type of growing.

Flood and drain by siphons with continuous pumping works well but requires balancing flow rates to get the siphons to work.

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PostPosted: Aug 14th, '09, 06:24 
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Make it a siphon drain, and all will be good.

C1 and myself and other have beds that are constantly flooded, however we are probably running a lot higher water flow, so root rot has not been a problem.

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PostPosted: Aug 14th, '09, 06:35 
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Seriously, this cant be healthy.
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I believe Omek did come back to the diagrams thread and mention that his is flood and drain so all should be good there.

I'm actually starting to think that I might turn a small system to continually flooded for the winter to help keep the water warmer so I can overwinter the tilapia when they don't need quite as much filtration anyway. Would be a good place for growing things that are ok with wet feet like salad.

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PostPosted: Aug 14th, '09, 13:25 
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yeah my plants root (the onions only) experience rotting..

i need to know,.. is aeration important for the roots?


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PostPosted: Aug 14th, '09, 14:19 
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this is the new look

http://www.youtube.com/watch?v=nBTbGunabSU


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PostPosted: Aug 14th, '09, 19:53 
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Ok from that video, looks like your system actually is running kinda constantly flooded. I don't see any drained down period really.

Aeration is important to plant roots. More important to some plants than to others but most plants grow best if the get a little air time.

If you can hook up some sort of timer to turn the pump on and off, the plants in the blue tub would probably do better.

The plants in the bottle would probably need an extra little hole in the bottle to let it drain out more when the pump is off.

However, you might need a separate air pump to run in the fish tank to keep the fish happy even when the water pump is off.

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PostPosted: Aug 17th, '09, 11:46 
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i want to know how the timer show its benifit to the whole system?


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PostPosted: Aug 17th, '09, 14:48 
Short answer Omek... a timer based "flood & drain" system mimics nature...

A period of wetting (rain)... a period of draining, which takes the water away from the roots allowing them to oxygenate and preventing rot... and a period of drying (as before)... until it "rains" again... floods.... and drains... floods and drains...

Root oxygenation is the key... and also serves to provide oxygen to the nitrification process... :wink:


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PostPosted: Aug 17th, '09, 15:35 
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and saves on the power bill.

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PostPosted: Aug 17th, '09, 16:58 
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be carefull with that timber incase it's been treated with something. Letting it get wet and run into the fish tank might not be good.

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PostPosted: Aug 19th, '09, 15:56 
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i think that (continuous pump) is the reason why my veggies are having growth problem


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PostPosted: Aug 19th, '09, 17:49 
Possibly, especially in a very warm, humid environment like your climate...

Either switch to flood and drain... or regardless... make sure you don't flood higher than 25mm below the top of the growbed media... the media should be about 300mm deep...


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PostPosted: Aug 19th, '09, 20:53 
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actually i'm trying to create something to avoid a continuous flow in the growbed. i mean...to have a flood and drain system


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PostPosted: Aug 19th, '09, 20:58 
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Seriously, this cant be healthy.
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Siphons.

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