Seachem PhosNet 50gram

PhosNet
Rapidly removes phosphate & silicate
Synthetic granular ferric oxide (GFO)
Less dust and thus is easier to use than most competing GFO products
PhosNet is a granular ferric oxide (GFO) with high porosity, high surface area
and high binding capacity. It will rapidly remove phosphates and silicates from
both freshwater and saltwater and will not release them back into your aquarium.
It exhibits stronger binding than most competing products and consequently can
reduce phosphates and silicates to very low levels. PhosNet also offers less
dust and thus is easier to use than most competing GFO products.
Directions
For best results, PhosNet should be rinsed before use and placed so as to
maximize the flow of water through it but not so that it tumbles against itself
in flow. It may be used in a canister filter, media chamber, box filter, or any
high flow area of a trickle filter. Use of a filter bag such as The Bag is
recommended.
Use 50 g (1/2 cup) for every 200 L (50 US gallons) saltwater or 400 L (100 US
gallons) freshwater. Leave product in place for 4 days, then test phosphate or
silicate concentrations with either MultiTest Phosphate or MultiTest Silicate.
If the concentration of the component you are trying to decrease has not dropped
to around 0.02 mg/L, then replace the PhosNet, otherwise leave in place until
levels begin to climb again. As long as concentrations remain under control, the
product is not exhausted. Over treating is not recommended. PhosNet is not an
exchange resin and does not release anything into the water. It does not leach
phosphate or silicate back into the water and may be removed, dried, and
returned to service until exhausted. Continuous use of small quantities is
better than intermittent use of larger quantities.