BBA on hairgrass

[Binks]

I find BBA is caused more by excess of Phosphate, rather than poor Co2 circulation.

I am having some BBA (in fact quite an irritating amount) in my 4 feet tank. Co2 is fully cranked, and circulation is 2x 2028.

Why I suspect Phosphate? because I've been seriously overdozing phosphate. So when the plants took up the nitrate and the micros, left with phosphate.

And I've also read on the web it's phosphate, rather than inconsistent Co2.

Anyone with same experience?

Cheers, Christophe

Tom Barr seems to think otherwise. Both in his site as well as here (see sticky on PMDD) he seems quite definite on it. I quote: "PMDD did bring the NO3, K+ dosing to the forefront in an effect to limit PO4 which was assumed to cause algae.

A mistake that Dupla and many other companies also made.

I have no idea why they, nor any of the other companies did not try and show that PO4 caused algae or not.

I added it, I never had algae.
Looking back at what really was significant and being able to tease apart which elements where significant is relative today.

But cables, ph controllers, PO4 limitation, NO3 limitation, Fe limitation etc are not particularly useful ideas today........practical experiences quickly tell you this.

I'm always amazed at how someone can be goign along dosing nutrients with good plant growth, have a 2ppm PO4 level, then when they get algae, they blame the PO4.

They did not have algae before they had the high PO4.
But they often only test when something goes wrong, notm (sic) leading up to it nor ever induce a possible problem on purpose."