Having major algae issues with fluval spec 5
Ok so I have a fluval spec 5 that I recently added the finnex 16in planted plus light. Recently green algae has taken control. I have 3 nerite snails and 3 otocinclus to combat it and still losing the battle. The only other fish is a betta. It has anubias nana on driftwood, 3 Moss balls. One plant of lacy water sprite and one java fern which. Replaced the purple cabomba I had because the algae just took it down.
Light normally is on 8 hours a day or so. I do 2 gallon water changes every 3 days. I have purigen rather than carbon in the filter as well. Ph is 7.0 no ammonia or nitrite and not sure on nitrate but it can't be more than 30ppm if that. What should I do? Would adding hornwort help? I've read that sucks up nutrients like crazy.