a 10g tank at work has had green water for quite some time now, 3 weeks or so. They've been doing water changes, I say 10% every day or every other day, but it's still the same. Now, this tank, unlike theo ther tanks at work, is using an incandescent lighting fixture. Could that be the major part of the problem? If I add live plants now, will the competing algae not let the plants live?