All these are good for oxygenating and purifying the water to reduce the growth of algae and they were freebies from neighboring wetland and ponds. 
We also built a pontoon near the garden gate so it it easier to jump in and out without slithering around in the muddy banks.
Despite the temperature not getting above 23 degrees, Al has been swimming regularly when it is really hot but not all the family are yet convinced!
