Why am I so Bad with GFO

[exnisstech]

I just was suprised about the dramatic drop with just a fraction of GFO

It is very good at stripping PO4 and quickly. I added two tablespoons in a nylon stocking so it wasn't even tumbling on my tank with approx 45g and PO4 went from 0.4 to 0.0 in 2 days. For me works best when mixed with carbon in a reactor. Sure it doesn't work like as well as it could but IME it's works too well. Mixing it with the carbon seems to be a nice slow reduction not just bottoming out PO4

 

[crabgrass]

It is very good at stripping PO4 and quickly. I added two tablespoons in a nylon stocking so it wasn't even tumbling on my tank with approx 45g and PO4 went from 0.4 to 0.0 in 2 days. For me works best when mixed with carbon in a reactor. Sure it doesn't work like as well as it could but IME it's works too well. Mixing it with the carbon seems to be a nice slow reduction not just bottoming out PO4

ya. i had just a small amount in a bag (low flow area). But other's said, I am leaning more on a timing/testing issue.

 

[exnisstech]

ya. i had just a small amount in a bag (low flow area). But other's said, I am leaning more on a timing/testing issue.

Not sure that timing makes much of a difference on PO4 results but I may be wrong. I definatly try to test at the same time if day for alk

 

[DanyL]

Not sure that timing makes much of a difference on PO4 results but I may be wrong. I definatly try to test at the same time if day for alk

I’ve done quite a few experiments with it and I found out it affects both Nitrates and Phosphates results.

Exact timing could be different from system to system, depending on decay/export time - water circulation, filtration, feeding types/amounts, refuge/GFO/Biopellets/UVC and probably more can affect this.

 

[crabgrass]

I think we can wrap this up to user testing or some sort of timing issue. I retested 2x today after pulling GFO and came up with a 0.11. Much closer to what I would have expected. Needless to say, like others said, numbers are fine and I will not tweak further.