GFO Offline Or Reduce GFO

[lx_Reef]

Long story short my PO4 has been hovering around 0.11 and just beat a GHA problem and added GFO last week to bring down to 0.05 range. I have test every other day.Since 3 days back has been at 0.02 on the hanna tester. Now the question is should I reduce the amount of GFO in half and hope that it slightly raises and maintains it there or take the GFO offline? Also what coming out of my GFO reads as well 0.02 does that mean it’s depleted?

 

[BaysEndReef]

I would slowly take the GFO out. Monitor for changes. Get it to a stable point. Stick with that.

 

[Jonify]

Slow.

 

[lx_Reef]

I would slowly take the GFO out. Monitor for changes. Get it to a stable point. Stick with that.

Thanks for reply I will remove some a tablespoon at a time and monitor, would you say my GFO is depleted at this point

 

[BaysEndReef]

Thanks for reply I will remove some a tablespoon at a time and monitor, would you say my GFO is depleted at this point

Quite possibly, but start removing what's in there first to see what happens.

 

[SPR1968]

I would leave it in place, although you could reduce the amount if you want to, but phosphate wants to be less than around 0.03 ideally so run it 24/7. If you reduce it, it will need changing more frequently

If my Hanna reads 0 I’m delighted because it has a margin of error and that means I don’t need to change the rowaphos yet. And it’s unlikely to be 0 with the amount of livestock etc.

As far as the output reading, it could be test error, or it could mean its getting ready to change. I change mine at around 0.04-6 but I also use rowaphos in large amounts to avoid the frequent changes.

There’s not necessarily any right or wrong way, all systems are different so adept it to your own requirements

 

[stanlalee]

Your very close to optimal. When my Hanna starts reading below 0.03 or zero I just feed accordingly to compensate until it's in range. I'd be fine with 0.02 if it stayed around there.