[QUOTE=Ghazanfar Ghori] Ok - now to go SLIGHTLY off topic - what do you guys think about H2O2 dosing?[/QUOTE]
Why? <img border="0" src="smileys/image026.gif" border="0">
Ozone in freshwater aquariums
[QUOTE=SCMurphy] Ferric is likely to form precipitates with
phosphates which is a good thing if it makes it into the substrate.
[/QUOTE]
Right, but my point is why add this stuff to the water column then?
You're taking a very expensive form of iron, making rust or salts
with PO4, only to have bacteria deep in substrate convert it back to
what you originally paid for so that plants can use it. Why not just
add some steel wool to the substrate, rusty nails, or even laterite if
you feel like spending money?
As far as this happening in our tanks (it prolly does in your soil
tanks), one of the reasons I want to get my hands on a redox probe
is to actually see if the highly porous non-soil media we use
(Flourite, etc...) is actually anaerobic enough to support iron
reducing bacteria... i always thought this was a stretch, because I
shouldn't need to put any iron in the water column in the first place
if this reaction is happening to any extent. So my current opinion is
that this stuff oxidizies in the column, settles in the substrate and
stays there, not bioavailable. We add iron to the column because
our very iron rich substrates (Flourite has a ton of Fe) isn't producing
enough Fe(+2)... the contribution from precipitates should be small
relative to the big chunks of Fe I have down there already... did that
make any sense?
As far as H2O2, again, are you talking just in general or spot
treating BBA? If we're talking about spot treatment, it works good.
We don't have any good ways of dealing with BBA, lets face it, other
than the 4" monster of a fish <img border="0" src="smileys/smiley17.gif" border="0"> . Ben Belton reports that a good
shot of Flourish Excel does the trick too, maybe better than spot
treatment with H2O2. BTW: Ghazanfar, not sure if you caught Mr.
Barr recommending CuSO4 for BBA treatment on the DFW board...
after all that business with AlgaeFix on the APD.... <img border="0" src="smileys/smiley2.gif" border="0">
Jeff
phosphates which is a good thing if it makes it into the substrate.
[/QUOTE]
Right, but my point is why add this stuff to the water column then?
You're taking a very expensive form of iron, making rust or salts
with PO4, only to have bacteria deep in substrate convert it back to
what you originally paid for so that plants can use it. Why not just
add some steel wool to the substrate, rusty nails, or even laterite if
you feel like spending money?
As far as this happening in our tanks (it prolly does in your soil
tanks), one of the reasons I want to get my hands on a redox probe
is to actually see if the highly porous non-soil media we use
(Flourite, etc...) is actually anaerobic enough to support iron
reducing bacteria... i always thought this was a stretch, because I
shouldn't need to put any iron in the water column in the first place
if this reaction is happening to any extent. So my current opinion is
that this stuff oxidizies in the column, settles in the substrate and
stays there, not bioavailable. We add iron to the column because
our very iron rich substrates (Flourite has a ton of Fe) isn't producing
enough Fe(+2)... the contribution from precipitates should be small
relative to the big chunks of Fe I have down there already... did that
make any sense?
As far as H2O2, again, are you talking just in general or spot
treating BBA? If we're talking about spot treatment, it works good.
We don't have any good ways of dealing with BBA, lets face it, other
than the 4" monster of a fish <img border="0" src="smileys/smiley17.gif" border="0"> . Ben Belton reports that a good
shot of Flourish Excel does the trick too, maybe better than spot
treatment with H2O2. BTW: Ghazanfar, not sure if you caught Mr.
Barr recommending CuSO4 for BBA treatment on the DFW board...
after all that business with AlgaeFix on the APD.... <img border="0" src="smileys/smiley2.gif" border="0">
Jeff
