Cold Water Extraction (Morning Glory)

Hmm, well I grinded up some Morning Glories, about 1000 seeds, and put them in clean cold water, left it in the Fridge for about 8-10 hours shaking here and there, and of course straining.

Well I've done this method before, but only 20 minutes, instead of 8 hours with less seeds, and it seemed to have more of effect thant the 500 8-1o hour brew.

I was wondering if anyone with experience knows if it was because I left it longer, or if it was the seed supply I ordered, from iamshaman