If you are planning on adding a fuge in the near future...I would just do a couple good size water changes...of 15 or 20 gallons. Do one now, and then another in 3 or 4 days. You should noticed a pretty good drop in nitrates. Bioballs are usually not recommended for reef tanks. They could potentially cause a rise in Nitrates as they collect waste material. Keep us posted. But start with the basics, water changes.