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Re: [APD] Re: H3PO4 and Green spot algae

Just a point in passing. Doesn't H3PO4 throw off the
CO2/KH/pH table? By depressing pH, it should make the table
show more CO2 than you really haveSomething to keep in mind
if you're putting acids in the tank other than the carbonic
you get from CO2.

Scott H.
--- Thomas  Barr <tcbiii at earthlink_net> wrote:

> "I am forwarding this message just to adhere to Mr
> Mifsud's method using
> concentrated phosphoric acids to remove green spot algae
> from anubias since
> Mr. Mifsud personally carried out this method of removing
> green spot algae
> successfully in my presence.  Any queries should only be
> raised whether this
> method is applicable on all aquatic plant leaves.
> However, the diluted acid
> in the aquarium did not affect at all the other plants in
> Mr. Mifsud's
> aquarium, namely glossostigma, echinodorus and crypts
> amongst others. "
> If Glossostigma is unaffected, then I would think most
> plants would not be harmed.
> But more convincingly.............H3PO4 is used for "pH
> down" (or was) at 30% and has been used extensively in
> planted tanks and at relatively higher concentrations,
> perhaps not like a dip.......................but the
> residual leftovers left in the tank itself should not
> cause any issues and should help, not harm the plants,
> since the green spot appears to be related to lower PO4
> limitations in planted tanks.
> This method might be faster for Anubias clean up than
> waiting for the GS to go away with improved environmental
> conditions through better CO2/PO4 additions. Additions of
> PO4 at higher levels and good CO2 levels will remove
> Green spot in a  week or two and prevent it from coming
> back. Both methods involve a plant fertilizer that at low
> limiting levels, is associated with GS presence.
> Regards, 
> Tom Barr 
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author of the best current authoritative text on aquatic plants 
will be a featured speaker at 
The Northeast Council of Aquarium Societies 30th Annual Convention.
March 18-20, 2005 at the Marriott Hotel, Farmington, CT
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