
To those saying it's old bulbs, are you telling me that new bulbs don't grow algae? That's like people saying if sunlight hits your tank you're going to have loads of algae. It's true if your tank is nutrient rich, but if there's nothing for algae to feed on it's not going to grow.
If the nutrients aren't there to grow algae, will algae grow regardless of the age of the bulbs? Probably not.
Back to the original poster, what are your params? Don't bandaid the problem, fix it.
