Posted: 10/06/2013 at 16:42
Having kept ponds for 20yrs, you have to apply the same maintenance techniques that you would use in a garden, to a pond. This means regular & often especially late summer/autumn....when you see something dead, rake it out the pond - don't let it sink to the bottom.
Plants are excellent for a balanced eco-system, never regret having them !
It's up to you which method you choose to clean your pond - what is the colour of the water ?