switch off co2 at night

[vikz]

hi

i just purchased a profilux3 pab and am new to all this and would like some help.

i have a calcium reactor which runs as follows....water feed is gravity fed and the co2 solinoid is on socket 2 with a ph probe (ph-value2) set to 6.00ph...co2 comes on when ph goes above 6.00ph

i would like the co2 to stop at 9.00pm and start again at 2.00pm.....so i do not suffer large ph drops at night

i have tried using nocturnal change but it only lets you change the ph by 1, so that would mean if the ph goes above 7 (which it will) the co2 will come back on...or have i got it wrong?

i dont quite understand the programmable logic function.

can somebody please advise or send a screenshot on how to set this up please.

it would b every much appreciated.

[vikz]

i have managed to figure this out now.