My family has have been frequenting swartvlei since the 1960's and we have a home on the banks of Swartvlei next to pine like which was built in 1973.
The mouth issue is a contentious one, many of the houses in the "island" on sedgefield lagoon have been built BELOW the high water mark, therefore when the water rises after heavy rainfall, the residents drains overflow, this started happening towords the late 80's and early nineties, SANParks then decided to open and close the mouth manually, resulting in the silting up of the lake and the lagoon. Throughout the 90's and early to mid 2000's there was a green grass prevailant in the lake which harboured habitat for the fish, and the birdlife, to my horror, I noticed this year there was NO grass to be seen!

I also went snorkeling on the shores infront of our house, which was once teeming with fish, is now dead

This i believe is a direct result of SANParks, wrecking the natural flushing system and filter the lake and lagoon actually is. Im seriously concerned, SANParks please shed some light on this matter. we used to be able to drive our boats al the way to Sedgefield from our house next to Pine Lake resort, this is now not possible anymore. Something is drastically wrong! We want answers!