Help on Nitrate level & water turn yellow

[comets55]

Hi guys

My water parameter is getting much much better, but I don't know why it is a little yellow. Not sure it causes from high in Nitrate? Please advice on how to bring down Nitrate value and fix the yellow water issue.

My parameter:
pH: 8.2
KH: 7dKH
Ammonia: 0.1mg/ L
Nitrite: 0.5mg/ L
Nitrate: 100mg/ L
Calcium: 475ppm

Please help!

 

[cashmoney6980]

Well I'm sure many people will say, for the nitrates, so water changes with RODI water. And some carbon thrown in your filter should help quite a bit with the yellowing. Purigen also has helped me quite a bit with yellowing and you can tell by the color change of it when it needs to be replaced or recharged