I have applied 2 tablets
I have applied 2 tablets of Sludge Remover and can see no appreciable difference. My pond does not have fish and I try to net off, or manually remove fallen leaves and other floating debris. The amount of silt in the pond is unchanged. There may be more improvement after 6 tablets. I purchased Sludge Klear due to its claim to work to as low as 4C.