I'm running rowaphos in a phosban reactor, using a mag pondmaster (rated for 150gph). I've got the valve at about 60%. You only turn it so the top of the media looks like it's simmering. Just a slight waving motion at the top 1/4" of the phosphate media. I got rid of my monster hair algae problem with this setup. Trust me, it was BAD, since I was cycling liverock and turned on the lights almost right away... won't do that again lol :redface:

as for rowaphos vs phosban, advanced aquarist analyzed them, and found them the same pretty much. There IS a ph drop if you run your ph at around the 8.9 range, but if you run at about 8.3, then you probably only will have a 0.1 drop for a couple days.

Be careful, you can shock your corals with the sudden drop in phosphates, these things work so well. You can go from 0.5ppm to 0.0ppm in an hour. And measuring phosphates with a kit is pointless, since they don't measure organic phosphates, which is what most forms of nuisance algae utilize. Kits measure inorganic phosphate, which ends up precipitating with excess calcium anyways.

Ah....maybe I did have too much flow then. I'll have to try it again.

Thanx and cheers,