Geritol liquid + other supplements

I just recently started taking Geritol liquid (started cycle day 2) and I'm currently on CD 5 and just got rid of AF. I have only been taking it once a day but have read that some take it in the morning and before bed. Should I take it twice for it to be most effective? 
Also, can I still take my prenatals + DHA with the liquid? I've been taking 800mg of Folic Acid and DHA but would rather just take my prenatals if I could but don't want too much of a certain vitamin!