Ratio of fish tank to grow beds

Stuart Chignell

Yep, good point, although I was assuming that people would allready have low densities but not enough gbs.

Always a bad idea assuming.

Earthan Group

Marc de Woose wrote:

.... which of the systems (flood and drain, constant flood etc) provides the potential for the most filtration.

Earthan Group wrote:

Filtration of biological or solids? If we are talking about the same depth beds with the same media and volume, then flood and drain will have more biological capacity and constant flow would have more solids filtration capacity.

Stuart Chignell wrote:

The amount of oxygen available to the ecosystem of a gb is mostly dependent on the amount of flow and the concentration of the oxygen in the fluid (water or water and air). A constant flooded intermitent flow system would have the least oxygen. Where as a flood and drain constant flow system would have the most oxygen available for the biological activity of the solids filtering or more properly the processing of the retained solids.

What is a "constant flooded intermittent flow system"? Is that the same thing as constant flood or does the OP mean constant flow and are they the same thing as the constant flooded intermittent flow system you mentioned? I am confused...

RupertofOZ

Earthan Group wrote:

Stuart Chignell wrote:

The amount of oxygen available to the ecosystem of a gb is mostly dependent on the amount of flow and the concentration of the oxygen in the fluid (water or water and air). A constant flooded intermitent flow system would have the least oxygen. Where as a flood and drain constant flow system would have the most oxygen available for the biological activity of the solids filtering or more properly the processing of the retained solids.

What is a "constant flooded intermittent flow system"? Is that the same thing as constant flood or does the OP mean constant flow and are they the same thing as the constant flooded intermittent flow system you mentioned? I am confused...

Me too.... how can a constantly flooded system.... be intermittently flooded... :laughing3:

TheNative

RupertofOZ wrote:

Earthan Group wrote:

Stuart Chignell wrote:

The amount of oxygen available to the ecosystem of a gb is mostly dependent on the amount of flow and the concentration of the oxygen in the fluid (water or water and air). A constant flooded intermitent flow system would have the least oxygen. Where as a flood and drain constant flow system would have the most oxygen available for the biological activity of the solids filtering or more properly the processing of the retained solids.

What is a "constant flooded intermittent flow system"? Is that the same thing as constant flood or does the OP mean constant flow and are they the same thing as the constant flooded intermittent flow system you mentioned? I am confused...

Me too.... how can a constantly flooded system.... be intermittently flooded... :laughing3:

Only when it rains hard enough...

However a constant flood can be intermittent flow, just have the pump on a timer and the beds remain flooded during the off cycle, though I don't think that was what was meant... :dontknow:

Stuart Chignell

Yep that was what was meant. It is a gb regime used for growing swamp and bog plants. I wouldn't recomend it for anything else.

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Ratio of fish tank to grow beds

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