My buddy Mark, who owns our local fish store , 7 Seas Aquarium, gave me this reactor yesterday; and I think I'll be able to use it with aragonite.
I previously had put aragonite sand in the bottom of my African cichlid tank but it was too messy and clogging up my sponge filters. The fish were constantly digging it up and making up mess of the whole tank.
Anyhow I told him I had taken out the sand and put the gravel back in and he gave me this fluidized bed reactor, which sells for something like $75 online. Or at least it will be a reactor once I put some aragonite in it.
I just set it up with the "mixed sand" media included in the Box to see if it would work.
... and I hooked it up to this little Cobalt power head I had lying around.
This is the lowest level to which you can adjust it with the powerhead running.
The adjustment is a little tricky and it's easy to get the level too high.
Here it is just boiling over on the surface.
My plan was to build a much larger one of these out of the used 5 gallon tank I have, but maybe it doesn't need to be that big for the 125/30/90 system.
I have no idea how effective this will be in any regard or how long it will last, but it runs, it doesn't leak, and it was free, I am totally happy.
I'm going to let it run for a while and cycle in the sand, because it will eventually get mixed in with my Sump filter. I would try it with the aragonite right now but it might not work as well. That sand could be too fluffy. This is running off of my 20 gallon sump which is the filter for my 55 gallon African cichlid tank.
Those fish will be going into the 125 in a few days. I have to do a little Plumbing and fill the tank.
