How often to change GFO

[tubz]

I recently got a BRS dual reactor and am running gfo in the one side. How long does it stay working before it needs to be changed out for fresh stuff?

 

[Salty B]

I would change mine monthly. Depends mostly on the conditions of your tank.

 

[Ulta]

I change it when I notice algae building up quicker =P

They say monthly tho ;)

 

[Nonfamous]

Depends. I change mine every two weeks running Phosban brand. I bought some ROWAphos today and I plan on leaving it in for a month. Stuuf aint cheap I'll tell ya! 100ml for $19.00.

 

[Amba]

Every 3 weeks

 

[tubz]

Well I changed it today, it has been around 3 weeks and I noticed that rust colored water was starting to come out of the canisters.

 

[ccCapt]

If you are seeing rust colored water, you are running too much water thru the reactor and it's breaking (grinding) the GFO down into dust.

 

[Nonfamous]

Just a note on the ROWA, it is much finer than the Phosban. It's also suggested that it should fluidize more than the Phosban. Since it is fo fine, it takes a lot less flow to do so. It's kinda hard to adjust it correctly with the Phosban reactor I am running. Claims for this stuff read up to 7 months! It is also claimed that once it reaches capacity it won't release the stuff back into the water. Theoretically you could forget to change it and not worry about it.