Ocean Free Hydra electro-plate filtration - thoughts please

[Stuart Lewis]

I actually bought the Hydra 40 on the 27/4/17. I set it up as per the instructions. Prior to installing the filtery nitrates were exceptionally high 160ppm, after 24hours this has dropped to 20ppm. No water changes or any other maintenance done to the tank.

 

[Stuart Lewis]

This my results with the Hydra 40 after 24hours in my marine set up.

 

[dw1305]

Hi all,
Have a look at <"Cichlid Forums - of Hydra 30..">. That suggests that an initial reduction in fixed nitrogen (including NO3-) is caused by temporary binding to a chemical, like a zeolite, in the filter.

cheers Darrel

 

[jaypeecee]

Hi Folks,

I know this thread was started a long time ago but, if anyone is interested, I recently wrote a brief review of the Hydra 20 here:

https://forums.thinkfish.co.uk/tank-equipment-reviews/evaluation-of-ocean-free-hydra-20-filter/

JPC