Looking for any advice I can get on this. I'll give you a little background on my experience. I am have been a freshwater fish guy my whole life. My current setup is a 50gal Jack Dempsey setup, but have had many over the years. I have built about 5 ponds, 3 with waterfalls all with other companies over the last 15 or so years. I upkeep, maintain, and repair setups for several clients, but leave the important stuff to the pros. I am looking for a pondless waterfall setup at my house. It would be my first. I have done a fair amount of research regarding different setup options. I am the type that would rather piece together using better products over buying a generic kit and not using it all. I am not opposed to a kit though if the right one pops up. My requirement is that it is more of a trickling flow for some background, rather than a raging river splashing all over. I also would like to build it so that short of a large problem like a liner rip the setup remains undisturbed. IE external pump, etc. My initial thoughts are: Full liner, no tubs and such external pump overflow setup calculator I found suggested 1500-2000GPM Flexible 2" line ??? collection in basket box ? flow appears to come out of ground up top.