No Flow to GFO Reactor

[theokie]

Cutting off flow entirely would allow it to go anaerobic, which would result in hydrogen sulphide build up, as soon as you opened it back up you would be dumping that into your tank, not good.

I have a canister filter that I use to remove detritus from my sump and got called away to work on an emergency and ended up leaving it for a week, it was pretty nasty when I got home to clean it out.