Phosphate media

[fkshiu]

Originally Posted by mark

Looks like you have put some thought into this.

Understand the difficulties in measuring phosphates and as doesn't seem the media itself in indicating (such as with types of DI resins) that's why I'm wondering on a method to determine when to change the media.

Do people normally just change out based on time similar to if running carbon (~6 wks)?

That's what I do. Through trial and error and careful observation of the tank I change my GFO out every 8 weeks and carbon every 2-3 weeks. Carbon actually saturates quite quickly and some people even advocate changing it on a weekly basis, but that's kinda annoying.

[plutoniumJoe]

When running both GFO and Carbon which do you pass the water through first?

[fkshiu]

I go: GFO --> Carbon simply because GFO fines can irritate my clams so I want the carbon to pick it up.