"swarvegorilla" wrote in message u...
each filter is matched to flowrate

How do you measure flowrate for an air driven filter ?
How do you check if you reached the "matching" flow ?
Where do you get the optimum flowrate for a given
air-driven sponge filter ?
Is it something written on the box the sponge comes in ?

and no, every sewrage farm is not an open system!
infact most are closed too!

Closed in what sense ?
Do you dump raw sewage into the same tank
cleaned water is taken out from the system ?
Interesting...

you have missed the point friend
and it's too late and my chicky is too hot
too explain now.
later tho


There is always another day - sleep well
and please explain this when you find some time.