I am building a water fall that is going to be approximately 7 feet tall. actually 2 of them on either side of a set of stairs with a small walk over foot bridge at the bottom. There will be a 1 foot deep pool at the bottom that connects the two waterfalls. I dont want a raging waterfall but something with a little pressure. I guess my main question is what size pump do I need to run and push aor pull the water up to the top of the waterfalls, and are there any that adjust the water volume and flow.

redfinger999

There are several things to consider. 1.How many gallons of water do I have in my pond? You should circulate the water in you pond at least 1x per hour. 2.You could run both falls off of 1 pump, by pitting a "y" in the line, 1 going to the left side the other to the right. In those lines going to the falls you put in a Ball Valve on each side. This enables you to open or close or slow down water going to one or both sides depending on what you want. You also have to consider if you have a skimmer, biofalls, UV light, bead filter etc. So if you have a 1500 gallon pond you will need approx a 35-4000 gph pump and you could adjust from there. You may also want to decide on wheather to use an internal or external pump. Also consider how far you are going to pump the water. The pump should be as far away from the falls a possible, so as to circulate the pond water. I live in Denver Colorado have plants and 21 koi and ponds freeze here so I run mine all winter, 24-7-365. Contact me if you have any other questions. This is just a start of the ideas to consider.