Fauna Marin Ultra Phos 0.04 475g
Reduce Phosphates Till 0.04 mg/L
PHOS 0.04 is a novel compound granule that safely removes phosphates and yellow substances from the aquarium cycle. A unique feature is the safe use of PHOS 0.04, as the PO4 value cannot drop to 0.00 mg/l. This ensures safety while maintaining high effectiveness.
Colour and nutrients are tightly bound to the material and do not re-release, helping to keep nutrient levels in the aquarium very low. Unwanted algae growth is effectively prevented, and corals can develop their natural colours.
| Product Details |
|---|
| Brand: Fauna Marin |
| Active Ingredient: PHOS 0.04 |
| Weight: 475g |
| Target Phosphate Level: Up to 0.04 mg/l |
FAQ
How does PHOS 0.04 work in an aquarium?
PHOS 0.04 works by binding to phosphates and yellow substances in the water, removing them from the aquarium cycle. The compound safely reduces phosphate levels to 0.04 mg/l without dropping to zero, which prevents nutrient imbalance and protects aquatic life.
Is PHOS 0.04 safe for corals and fish?
Yes, PHOS 0.04 is safe for corals and fish. It does not reduce phosphate levels to zero, avoiding potential harm to sensitive organisms. The nutrients are tightly bound and do not re-release into the water.
Can PHOS 0.04 prevent algae growth?
Yes, by keeping phosphate levels very low, PHOS 0.04 effectively prevents unwanted algae growth, allowing corals to maintain their natural colours.

Anne Burgess –
I’ve used PHOS 0.04 for three months now and noticed a significant reduction in yellow algae. My corals have regained their vibrant colours, and the water clarity has improved. No fish or coral stress observed. Very effective and safe.
Justin Ellison –
After adding PHOS 0.04 to my reef tank, phosphate levels dropped steadily. The water stayed clear, and algae growth stopped completely. The granules dissolve slowly, so they don’t spike nutrient levels.
Kylie Metcalfe –
Good product for reducing phosphates. Works well in a mixed tank with corals and fish. The granules are easy to mix into the substrate. Slight delay in visible results, but worth the wait.