what test kit are you using to determine that your nitrates are 2.5?
my obvious guess is your tank is still cycling or was and you are adding stock way to fast. the dust your seeing is diatoms, they are one of the first stages of the algae cycle.
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Given sufficient thrust pigs will fly just fine.
90 Gallon LPS tank - Challice, Acans, Favia, Diplo and Zoos
125 Gallon SPS Coming Soon!
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