You should try carbon dosing to bring those organics down. With carbon dosing you will want to feed your system A LOT. I had to get used to it because I used to starve my livestock before I started doing it.I've had this tank up and running for over 3 years now.
I've had nitrate issues in the past but they seem to have just about gone away since I started using ro/di water.
The problem I'm having is this yellowish film that develops on the glass. It's thick, it's constant and no matter how much I mag float it, it keeps returning the next day. I can't go two days without having a thick film on my tank walls.
I am not over stocked, I do not over feed. I have more than enough flow. I have a good sump and skimmer. I run gfo and rox carbon. I change out my filter sock every 2 to 3 days. I have good lighting with two led steps and four t5 lights (about 2 months old).
I just don't get it. How do I defeat this stuff? Is not on the rocks that I can see, just on the glass.
My levels are pretty good at....
Ph..............8.4
Nitrate......5.0
Phos...........0
Calcium....520 (I know it's high)
Kh..............7dkh / 125.3
Mag...........1480 (approximately)
What could my problem be and how do I fix it?
Lights are
Orbit marine led
Fluval sea reef led
4 t5 at I bulbs (3 blue 1 purple)