Hey Serg,
My water change schedule is about 10-20% per week.
I guess that´s enough for polys isn´t it?
But perheps it´s becaus of my new filteration.
I sold my Fluval Fx 5 and instead i bought a Jbl 1500....a much smaler one.
I done this because of the powerful filteration of my Fx 5,all my plant´s starts to die.
Now my plants grow up,like you can see in the picture´s.
Today the eye´s are still cloud,but not that much like two days ago.
So i gona make a big waterchange again.
....let´s hope.
greets,
Jan