For phosphates you can use molybdate solution but be careful it contains sulfuric acid.
plant nutrient
The predominant ones are nitrates, carbonates, sulfates, silicates, aluminates, and phosphates. There are several variations of the latter three of these types.
Because nitrogen and nitrates are not easily permanently bonded with other elements. As are for example, the silicates or the phosphates. Or even the oxides.
Many compounds of uranium are known: oxides, halogenides, nitrides, carbides, silicides, sulfides, nitrates, sulfates, phosphates, acetates, carbonates, borides, hydroxides, oxalates, etc.
nitrates are fertalizer, chemical wastes, and pee and poo that atracts algea phosphates are dtergants that attract aglea
secondary treatment
For phosphates you can use molybdate solution but be careful it contains sulfuric acid.
Examples: potassium chloride, phosphates, nitrates.
Try to stop phosphates and nitrates entering the water
These are salts derived from the same acid; examples are: nitrates, chlorides, sulfates, acetates, fluorides, phosphates etc.
Fertilizers are not acids; they are phosphates, nitrates,etc.
plant nutrient
Mineral salts. Principally nitrates and phosphates.
The useful mineral nutrients for plants is NITRATES and PHOSPHATES.
Nitrates and Phosphates.
Plant and algae growth increases