I just plug the center tube with my finger and pour the needed amount of media in, then put the foam ring in to keep the media from escaping. If you want / need to rinse the media before use, I do so in a measuring cup, then use that to help pour the media in.
Or take a bucket of RO water and put the pump inside....drain into sink...turn it on and flush the chamber with media till water goes clear. (lazy mans way)
I've heard of, but never experienced, cases where using too much phosphate remover in a tank with known phosphate issues can "shock" the system due to the immediate phosphate depletion and potentially lead to problems. While this doesn't necessarily seem bad (quickly eliminating all of the phosphate), it's important to remember that nothing good happens fast in this hobby. Other than that, I don't have anything but those couple of stories I heard, which may just be that -- stories.
Well, this will be for the new 90 tank so nothing will be in there to get shocked to start with. So I've got 250ml and should be fine for that tank and sump then. Any idea how often it should be changed?
I tend to be lazy and don't change mine as often as I should, but I've seen others state that they change theirs once a month. I change mine every 6 - 8 weeks (usually the latter), unless I start to notice some nuisance algae popping up.
Greg: try this site. the price of GFO is expensive to buy the "little" jars of Phosban or Rowaphos. Bulk Reef Supply has much better prices. Also, Ace had advised on another thread (somewhere in here) that you can't really go by the "Phosban good for 6 mos" you replace it when the performance notes that it is exhausted and you start getting readings of phosphate showing up. Here is the link: http://www.bulkreefsupply.com/
David