I copied this from another post I had a while back. I still need to get some pics or video of the filtration I made.
Thanks. Some will disagree and not like my filter design but it works perfectly for me and keeps the water clear and the bottom clean. This pool is only temporary anyway until my fish room is done.
I have the pool filter running and this is the filter I made:
I have a 3000gph pump drawing from the bottom center going in to 50 gallon tote #1 where it's filtered with microfiber towels and sponges leaves there:
Goes to 50 gallon tote #2 where it goes through bioballs on one side and then through thick cotton mesh type of material
Leaves there and goes to 50 gallon tote #3, with some pond plants and lava rock
Finally through 50 gallon tote #4 with pillows (yes pillows - see below) and falls back down in to the pond which is what you hear in the video.
Pillows: I was in Ikea one day and saw these and the first thing I thought was how they would be perfect for a filter. The pillows are 1.99 each. These pillows are PERFECT for filtration. The pillow is made of a tightly woven mesh polypropylene (almost like an aquarium net) and filled with polyester fiber. The water flow through this is absolutely perfect. It catches anything totes 1-3 don't catch. I am actually going to go there today and buy maybe 20 or 30 more of them just to have for the future because of how good they have proven to be.
I have 2 pumps that are 600gph angled for bottom water movement and so that any waste is pushed right to the center and the 3000gph picks it right up.
ph, nitrates, ammonia, all stay good and I check daily. The fish are happy and healthy.