Took some readings today... very please with the FR with 200g Phos-sorb.. managed to reduce the PO4 to zero..
[1] dKH
To counter the temporary drop in pH & KH when running the FR with phos-sorb, kalkwasser and alkalinity booster was dripped in alternate cycle.
[2] Calcium
Calcium level a bit on the low side, will concentrate on bossting the calcium to 450ppm by dosing kalkwasser..
[3] Phosphate
Finally reduce to zero
[4] Nitrate
Remains at zero