Planted Tank Guru
Join Date: Mar 2014
Location: Ontario, Canada
Your problem is a combo of lack of nutrients, too much light, and not enough ferts.
I suggest raising your light, more frequent water changes, dosing dry ferts, getting more plants, floaters are key, keep a clean tank.
You will be out of the woods if you work towards providing what the plants need.
75 Gallon Low Tech w/ Green Terror Pair