Help Please

[Terry DeMott]

here is some pic of tank
sal 1.025
cal 450
mag 1340
nitrates .25
pho 250
The tank is 8 yrs old never had a problem before now . Rocks are brown and algae on back of glass
running bio pellet reactor with small refugium. Do 30 gal water changes every wk

 

[GillMeister]

PHO 250.

That has to be a typo or we found the smoking gun.