How long to run a Phosphate Reactor for?

[gordoncheers]

I would assume to run it until my phosphates drop to an acceptable range then I can turn it off and when the phosphate levels rise again I can turn it back on again.

 

[Randy Holmes-Farley Verified Community Expert]

What is the current value?

Driving phosphate too low or dropping too fast is a bigger issue than having it high.

 

[Miami Reef]

I wouldn’t recommend allowing the water to stagnate in an enclosed area.

Use a smaller amount in a reactor constantly, and when the phosphate gradually halts, replace or remove the GFO entirely.