Fair warning.
I purchased a Reactor last week and ran Phosban in it.
I was using a Lifegard unit - I had it set and it was working fine for a little over 24 hours, then when I went to sleep last Friday night, the Phosban leaked into my system.
I woke-up to a completely Brown tank, fish bleeding from gills (From iron poisoning), all my piping, pumps stained brown.
I spent a good 3 days cleaning up the mess and ended up replacing a few parts.
I lost 2 cleaners and a coral. Fish are back to normal, but it was a huge mess. So make sure you have that thing set correctly cause it can get out of hand very quickly.