Chaeto

[SkiFletch]

You're very welcome.

Reverse photoperiod is when you turn the lights off in your tank and on in your sump then off in your sump and onn in your tank, so durring the night when the tank lights are off the sump lights are on, and during the day when the tank lights are on the sump lights are off.

Agreed, doing a reverse photoperiod like that keeps the pH from fluctuating and keeps the tank very stable. Before when I had no sump with chaeto my pH fluctuated from 7.8 during the day to 8.2 during the night. Now, with a reverse photoperiod my pH is almoast 8.1 or 8.2 whenever I measure it

 

[Opcn]

Reef crystals has extra trace elements in it, so if you change 20% of your water every two weeks and you don't have many corals then you don't have to worry about doseing