Adsorption isotherm of Phosphat-X-globuli:
A statement, howmay grams phosphate 1 litre adsorber material will remove is incomplet and gives no evidence about the efficiency of the material. This statement make sense if the phosphate concentration is given, too. Because: the lower the wished concentration the less phosphate will be adsorpt. This is a physical law. An objective statement is only possible with a so-called Adsorption-Isotherme.
The above adsorption isotherme of Phosphat-X-globuli shows the capacity:
Choose the wished phosphate concentration, e.g. 0.05 mg/l for a hard coral tank. Head on the x-axis to 0.05 ppm and then vertically till the graph, then head horizontal to the y-axis and read out the value: 2 g/l Phosphate-X-Globuli. For a soft coral tank with a upper limit of 0.5 ppm the capacity will be 5.5 g/l.
Info: in fresh water or at lower temperatures the capacity is higher.
Typical decline of the phosphate concentration in an aquarium with a high level of phosphate (blue and purple) and with low start concentration (yellow) while using Phosphate-Xglobuli. The loaded PMR filter was started at day 0. Within 3 days the high phosphate concentration drops below the harmful concentration of 0.2 ppm. If you start with lower concentrations the adsorption capacity will stay longer.
To prevent an increase of the phosphate concentration at low levels the service life will least several weeks depending on the size of the aquarium, the size of the PMR filter, and the input of phosphate (e.g. feeding). Not before the concentration reaches the upper limit the Phosphate-Xglobuli have to replaced.