Hello, I've had this multifasciatus tank for about 3 months, cycled and stocked with 6 multies (I've got a pair who have 5 fry right now). Parameters look okay, nitrates less than 20 ppm, pH ~ 7.6. But the tank is completely overrun by green hair algae and blue green algae (cyanobacteria). I've got java fern and valisneria growing in there. I do not add ferts. The light stays on from 9 am to 7 PM, sharp, each day. And I know that is a pretty large photo period but the plants I've added are very new, about a week old and prior to their introduction the light was only for viewing the tank and giving the fish a steady day night cycle. Now, I'm wondering how I can eliminate the cyanobacteria without meds, and curb the green hair algae?