i am getting a 3metre(10ft) diamtre pond which will be 60cm high(2ft). for obvious reason raisng it would be hard. what filtration choices do i have. i was thinking. a pool sand filter with approx 15000lph(3900gph). and another with 2800lph(728lph)for bio filtration. firstly if i was to do this how would i plumb it? and wat are my other filtraion possibilities