How to lower nitrates in my zeovit tank

[teguhadi]

Hello,

I have a 100G zeovit tank that running about 3 months, recently I got my nitrate spike up to 25, usually my nitrate are about 5 - 10. My phospate is quite stable around 0.03 - 0.06

I dose as follows as recommended by this forum :

Zeovit 600gram in reactor...

[teguhadi]

That is pict of my acro that got brown algae on it tips. What should I do now ?

[teguhadi]

[teguhadi]

Noted. Two of my acros getting brown algae on it tips and then slowly dying, in your opinion what caused that happen ? Is it alk swing ? Because I keep my Alk between 7 - 7.2 with Alkatronic.

[teguhadi]

Ok I'll do it. In your opinion, what makes my sps darker than usual ? Is it because PO4 ?

[teguhadi]

My potassium level are 344 using Red sea test kit, should I dose K balance to raise it ?

[teguhadi]

Is it okay if I dose zeofood while my PO4 is 0.06 ? Will it raise PO4 ?