The doultan candle that I have starts pretty slow to be honest. Water will seep through it primed or not but it is a bit slow at first. But after running it overnight, isn't as bad. If the aquacrest is as good as the berkey's ratings, and is cheaper, that's good. I know this is off topic, but there is a stream that comes up often near our graveyard after a heavy rain or two. When I was growing up, we would regularly get a drink from it if it was running while we were working in the garden. Anyway, I used the zero water filter meter thing just to see how many parts per million (ppm) contaminents were in it while it was flowing full stream. I was amazed. The little meter thing read 004. For giggles, I checked a commercial bottled water. It was 012. My uncles well water was 028. My city water read 120 something.