Here are complete instructions on how we made our backyard stream and pond. I hope it helps.
Goplus Pressure Bio Filter:
https://www.amazon.com/Goplus-Pressure-Filter-4000GAL-Light/dp/B016M6DODK/ref=sr_1_2?crid=15WX1EBFOWK98&dchild=1&keywords=goplus+pressure+bio+filter&qid=1588773877&sprefix=goplus+pressure%2Caps%2C481&sr=8-2