Phosphates went up with ElimiPhos?

[TheEngineer]

I started running a bag of Tropic Marin ElimiPhos a week ago to try to pull my phosphates down. They were at 0.046ppm a week ago. I tested yesterday and today with separate cuvettes using my Hanna ULR Phosphorus kit and came up with .07ppm both times and days.

I recognize this could be testing error. Could there be another explanation? Increased algae die off from the phosphate remover?

Finally, is GFO more powerful at removing phosphates?

 

[glb]

It could be the cuvettes. I’ve had testing error with Hanna Checkers. I cleaned them with vinegar and that took care of it.

As far as GFO, I’ve found it to be very effective in reducing phosphates. Good luck!

 

[Randy Holmes-Farley Verified Community Expert]

I think the most likely explanation is that you lowered it once and it has come back up.

 

[TheEngineer]

I think the most likely explanation is that you lowered it once and it has come back up.

Even with the phosphate reducer still in there? I just ordered GFO.

 

[Randy Holmes-Farley Verified Community Expert]

Even with the phosphate reducer still in there? I just ordered GFO.

Oh, I didn't realize it was in a bag . It may just be depleted, or needs remixing to expose new particles from deep down.