I know my brown water is from foliage at the bottom. Didn't have this problem w/ my smaller pond it was much more easier to manage. I could net all the leaves out. My pond now is much larger, went from 600 gals to 2500 big difference! I know I have to get the leaves out w/ a vacuum but after I'm done will the water clear up w/ filtration or do I have to do a partial water change?. Any help or suggestions will be appreciated. Thanks in advance to all.