GaryD
19th July 2010, 10:05 AM
Hi,
I travel at least two hours each working day. To allay the boredom of driving in city traffic, I listen to audio books.
My current book is The Lost Symbol by Dan Brown and while listening a couple of days ago I heard the following statement....."Wide acceptance of an idea is not proof of its validity."
It struck a chord with me because it's so very relevant to what we experience in aquaponics because while some ideas are widely touted (and accepted) they are simply not valid.
A few examples......
Grow beds must/should be 300mm deep.
Grow beds can act simultaneously as solids/biological filters.
30kg of fish per 1000 litres is a useful stocking density rule of thumb.
One fish per 10 litres of water
For each litre of fish tank volume you must have 2 (or one) litres of grow bed volume.
Aquaponics is easy - just add water and shake.
It takes little for an experienced aquaponicist to blow holes in these widely held notions but they continue to trap new-comers to our discipline......so it's important to revisit them often.
Gary
I travel at least two hours each working day. To allay the boredom of driving in city traffic, I listen to audio books.
My current book is The Lost Symbol by Dan Brown and while listening a couple of days ago I heard the following statement....."Wide acceptance of an idea is not proof of its validity."
It struck a chord with me because it's so very relevant to what we experience in aquaponics because while some ideas are widely touted (and accepted) they are simply not valid.
A few examples......
Grow beds must/should be 300mm deep.
Grow beds can act simultaneously as solids/biological filters.
30kg of fish per 1000 litres is a useful stocking density rule of thumb.
One fish per 10 litres of water
For each litre of fish tank volume you must have 2 (or one) litres of grow bed volume.
Aquaponics is easy - just add water and shake.
It takes little for an experienced aquaponicist to blow holes in these widely held notions but they continue to trap new-comers to our discipline......so it's important to revisit them often.
Gary