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White edges to a small area of p.helferi leaves?


23 Oct 2007
Cumbria, UK
I noticed last night that one patch of p.helferi (which I have all around the tank) has got a strong white colour the leaf edges. All other plants including p.helferi elsewhere in the tank are fine.

I've been dosing liquid carbon on top of full EI and TPN with pressurised CO2, the carbon to try and eradicate the last bits of staghorn in the tank - I've been fairly heavy with the carbon as the staghorn appears invincible :)

Could this be related to the carbon, or does it suggest a deficiency? With no other plants affected, I'm not sure if it is something specific to where this patch is, right bang in the middle of the flow from the Koralia.

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