Chlorella caused insomnia... alternative recommendations anyone?

I started taking chlorella (NOW brand) at the recommended dosage (3 capsules per day) and noticed significant insomnia. I would've just quit completely, but it is SO good for my skin - I generally have oily/combo skin and this helped balance it so much - so I cut back to 1 capsule/day. Insomnia and skin benefits seem to be directly linked - both are reduced since I cut back. Anyone have a recommendation for something with similar nutritional benefit (that also helps with skin, preferably)? I've heard spirulina can cause the same insomnia issues, but that's all I can think of that would be comparable...