View Full Version : Vertex RX-U 1.5 reactor & ROX .8 carbon

11-17-2015, 06:34 PM
Anyone have one of these reactors ? I find it a pain to refill - carbon floats , fits thru sponge & spits carbon all over my sump . Anyone have any tricks or suggestions .

11-17-2015, 06:45 PM
Soak the carbon first for 30 minutes and make sure your flow is appropriate. It doesn't need to be dancing all the way to the top of the reactor.

11-17-2015, 08:23 PM
Thanks , I tried just soaking in reactor. Seems better . The flow is minimal , just to see carbon barely moving.
As soon as I start flow some seems to start floating to top. Is that normal , that you'll get a few grains spitting out ?

11-19-2015, 09:01 PM
It shouldn't float if it's properly waterlogged. You may lose a few grains here and there, but that's endemic to any reactor.

01-17-2016, 10:43 PM
Stuffing the top with filter floss or the black foam cut to size helps.

01-17-2016, 11:29 PM
Thanks . I found by soaking for 24hrs , seems fine.

01-18-2016, 02:04 AM
I don't like ROX carbon for that reason. I prefer pelleted carbon. I have a box of ROX I'm trying to use up, and I've been using it passively in a coarse media bag in the sump.

01-19-2016, 10:54 PM
I thought carbon shouldn't tumble in reactors. Or are we talking a gfo?