There is no phosphate in the water. Why should I use JBL PhosEx Pond Filter?
Phosphate is the limiting substance to control the algae growth in the garden pond. The value should be under 0.05 mg/l. In limnology (freshwater science) values of 0.035 mg/l are given.
Many tests for phosphate don’t dissolve or don’t dissolve sufficiently in this measuring range.
Also if phosphate can’t be detected with those tests, it gets constantly over fish food, plant remains or material entry through wind into the garden pond. If there are algae the phosphate is mainly bound in them and cannot be detected. For the permanent limitation of the phosphate content the application of JBL PhosEx Pond filter is useful.