"John Hines" wrote in message
...
"BenignVanilla" wrote:

Is there a sizing algorithm for settlement tanks?

Sure, keep the water in the tank long enough for stuff to settle!

*laugh* OK, so what's that time period?
snip

If you connect a 30 gpm (1800gph) pump, that would allow less than 10
seconds settling time, which is to say none.
snip

I did some quick math, assuming a 2000 gallon pond, and an 1800GPH pump. It
would take the pump 67 minutes to circulate the water in the pond. With a
200 gallon settlement tank, the water would have only 7 minutes to settle in
the tank. I realize this does not take into consideration of the volume in
the pipes. I am just trying to get close here. So is 7 minutes enough? I am
guessing not. A 500 gallon settlement tank would provide about 17 minutes of
settle time. Still seems a bit low.

The reason I ask is that, it seems like a lot of work and doing to get a
settlement tank going. Since I plan to have a shallow veggie filter,
cleaning it should not be a big deal. I am wondering if I should just forget
the settlement tank, and let the sediment come into the veggie filter, which
could easily be drained, cleaned and refilled.

BV.



Go google and take a look at some of the designs on the web.