All parameters good. Changes include running skimmer for last 2 months. Added 225ml bag of Blue Life Clear Fx filter media to fuge intake flow area.
Not all zoas are being affected.

3 stage pics.
2 months ago
qu3y2eqy - Zoas receding or melting?
1 months ago
yna7a2aj - Zoas receding or melting?
Today
6ujary5u - Zoas receding or melting?