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RE: [APD] Spot Algae

>   I'm starting to get a good amount of spot algae on my tank 
> glass.  It's tough, and doesn't wipe off easily - I'll need a 
> credit card to get it off, maybe even a razor.  Removal of it 
> is one thing, but how do I prevent it from coming back?  I am 
> using EI dosing (KNO3,K2PO4, TMG) w/ CO2 diffused through an 
> Hagen ladder at about 1 bubble/sec, 85wpg (T8/6) on a 35 gal 
> (14hr/day), 50%+ WC/week.
>   Am I missing something?

How much PO4 are you adding?  Spot algae can usually be reduced by
upping the PO4.


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