Description
High levels of phosphate in an aquarium can cause several issues. The most obvious is unwanted algae growth, which can quickly make a tank unsightly and difficult to manage.
More importantly, phosphate directly inhibits the growth of corals and calcareous algae. Scientific research has shown that concentrations above 0.05 mg/L can reduce calcareous algae growth by as much as 90%, highlighting the importance of keeping phosphate under control.
Simple practices such as rinsing frozen fish food after thawing can significantly reduce phosphate introduction. Likewise, avoiding poor-quality activated carbon that leaches phosphate will help maintain stable levels — always test carbon before use to ensure it is phosphate-free.
The Salifert Phosphate Test Kit offers a reliable way to monitor phosphate levels accurately and is available now from Ocean in a Box at a great price.





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