I am working on my 8000 gallon pond I am going to go with a bigger pump for a larger water fall also going to add a 21 foot long by 4 foot wide buy 24 inch deep planted bio filter system that I am making my self. It would be great to here Ideas on what kind of pump you guys think I should use also the hole system when I am done will be over 10000 gallons I like the external pumps found one that will only use 450 watts for 8200 gallons an hour I have two skippy filters on the pond now and will be using those also and 2 skimmer boxs I want to move all my plants out of my koi pond but still want them to help with the filtration plus my koi mess them up