If you can, removing it will do two positive things. First it will remove what will ultimately become muck in the bottom of your pond and added nutrient load. That is helpful long term. Also if you do too much of it at once the decaying material uses oxygen and it can cause an oxygen crash which can kill fish. That will help short term.
If you are doing lots of it (significant portion of the area of the pond) and can't remove it, it is suggested to do only partial areas at a time so as to avoid a DO (dissolved oxygen) crash.
Last edited by snrub; 06/23/16 08:58 AM.
