Hey all. We just bought a house in December, and out back there is a gazebo with a koi pond (pic below), and I've been battling this black-green water trying to get it clean. I never had a pond before, never had fish before, so this is a learning experience. The owner said to just clean the filter once or twice a week and it will be straight. BS. Been cleaning that thing almost daily and it is still black. The filter being used is this giant pool filter, which does clean out quite a bit of the algae. I just bought an actual pond filter, a CPF-180 with the built in UV purifier, which I believe is the right size for this pond. As best as we can figure, the pond is max 1600 gallons. Problem is, after reading the manual, I'm concerned what will happen if I hook it up to the pump out there. I pulled the pump out of the water and gave it a cleaning (it was saturated with gunk, same with the net bag it was in), and it is an Alpine PAL8000, which pulls 8000 gallons per hour. 8000! This filter is rated for 2113gph max, a quarter of that. Will this pump destroy this filter. I'm thinking of keeping the pool filter in the mix, and have that feed into this filter to tone it down, also to help get out more gunk before it reaches this filter. I really don't want to have to order another pump and wait another week before hooking this up. The current setup is ugly. Once it's cleaned up I want to add a water fall and maybe a spitter (or gusher more likely), replacing that pvc with proper hoses. Any advice would be welcome, sorry for the long post.