halides are on for 8hrs a day and OR3 (x2) are on for 12 hrs a day. i chanjge 25 gallons a week on 225 gallon total water volume.I run 8hrs halides 9hrs or3.
On my standard 120 I run 2 250 watt de 14k phoenix and have no trouble growing acros on the bottom. I have 2 or3 light bars also.
Halides are 14.5" from the surface to the bulb.
Ph has run 7.9-8.1 for 2.5 years with no issues.
Tanks 2.5 years old.
10% WC once a month.
Carx
EZ trace dosed daily.
Alk 8.0
Ca 410
Mag 1350
Po4<.1
No3<5