Fluval Phosphate Test kit will test you Phosphates between 0.0 and 5mg per Litre. Phosphates can be a contributing factor to algae issues.
When organic matter decays, phosphates are released into the water and can cause undesirable algae as well as inhibit the growth of hard corals. Test as needed.
Kit includes:
2 x PO4 (10 ml)
1 x PO4 (10 ml)
1 x Pipette
1 x Glass test tube
Instruction booklet