"RedForeman ©®" wrote in message ...
looks like low light brown algae, otherwise, it could be plain normal algae
in a non co2 tank...

you say 65w, but not what size tank... I assume a 29/30ish and under those
conditions, I'd say it's probably in need of Co2 easily... 2 days after I
disconnected my CO2 from my 29 with 65w PCF, I had brush algae... yippee....
now that tank is infested with it, and it doesn't react to lights being off,
so it's a manual tear down to rid it...

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RedForeman ©®

My tank is 20 gallons... sorry I just forgot to put that in there.