I recently installed a bottom drain to my 12 ft round 5ft. Deep pond. I put a diy sieve barrel in the ground with a submersible pump feeding from the top to a pressurized filter with some success.
I recently ripped it out and installed a vortex barrel than to a smaller holding tank to house submersible 5200 gph to a birdman sand and gravel,out to a waterfall and or tpr.
My problem is holding tank is emptying too quickly. No matter what size pump i use.
I put a ball valve in front of sng filter to slow the flow, but it also slows down vortex flow therefore causing low flow n improper filtering.
My question is can I eliminate 2nd housing barrel n use an external pump n solve this problem. It would go from 4" to 2"
I also have another pump on the skimmer helix teed going to a bog filter then to a moving bed of bioballs then to a tpr retro.and teed to another pressurized sicce filter finally sharing input to warerfall. Hope that makes sense.