Gfo/gac

[Aaaron]

Is it okay and beneficial to change out these 2 components every 2 to 3 weeks? With water changes weekly as well?

 

[Randy Holmes-Farley]

That's about what I do, except I let them run longer. More like 4-6 weeks, but that's more laziness than a plan.

 

[Aaaron]

But its okay 3 to 4 weeks

 

[duberz]

Mr Farley how much gac/gfo do you run in your 120?

 

[bertoni]

3-4 weeks should be fine. I went with a fairly random schedule for a few months while I was traveling heavily, and everything survived.

 

[Randy Holmes-Farley]

I fill up the cannister filter I use with the two mixed together (GFO and ROX carbon). That's probably about 3 cups?? and it is about 1/3 GFO.

 

[tmz]

I run them separately, They may exhaust at differnt times. . Haven't seen a need for gfo in thte last 5 months,though. Change them monthly on averagae ; gfo may need a much shorter change period if PO4 is high.I do 1% dialy water changes.

 

[duberz]

I'm running a cup each in my 80gal bare bottom.I think my water is to clean though.Do you think if I cut back to 1/2 cup each I may see improvement?I currently feed twice a day and dose acropower once a week.All my levels are in your range for reef tanks that I use off an article you once posted.Only one that doesn't is po4 which is always zero on my hanna.Everything is doing good except pale sps colors.

 

[DiscusHeckel]

I run them separately, They may exhaust at differnt times. . Haven't seen a need for gfo in thte last 5 months,though. Change them monthly on averagae ; gfo may need a much shorter change period if PO4 is high.I do 1% dialy water changes.

So do I. In my opinion, modular approach is good because one feeding pump fluidising both GFO and GAC becomes a single point of failure. You can also adjust pumps' speeds independently according to the media you are using.

 

[BrentH]

What if u change out the rox or gac and gfo say every week would that matter versus 3 week month or whatever? Curious if u can over do it ?

 

[BrentH]

The reason I ask is beacause I've been changing my gac out more often in hopes to help whatever's going on in my tank about every week to 2 and I kinda use a lot I hope I'm not over doing it.… sorry op don't mean to derail your thread

 

[Aaaron]

No know not bro. How big is your tank? On BRS there is a calculator for GFO and GAC use it it will let you know if you are overdoing it.

 

[Randy Holmes-Farley]

Using less and changing it more often is a fine plan. Yes, you can overdo, both GFO and less so, GAC, but changing more often is just more work and possibly less efficient (more expensive) use of them if they get removed before depletion..