The flow of the spring is so high that it completely replenishes the lake every 3 days.
The temperature of the lake varies between 23-25 C in winter and 33-36 C in summer.
Lake Heviz is a biologically active lake and home to a large number of bacteria.
Some of the species found in the waters is unique to the lake.
Health tourism is thriving industry here, based around Lake Heviz.
Sources:Wikipedia/www.lakeheviz.com/Visit Budapest/Tourinform Heviz/