smoothdog
Active member
Correct me if I'm wrong but those are 3/8 or at the most 1/2" ID fittings and pipes. I don't think you can force 700GPH through that. At least not without creating major pressure on everything.
If you have a MaxiJet 400 I would try throwing that on there. Those are not pressure rated like the Mag7. The fittings should be pretty close to the size you have. You may have to play with the inlet a little. These pumps worked great for the Sulfur Denitrators I used to build.
One more thing I would change. I learned that it is better to control the outflow from the reactor instead of the supply. For some reason when you restrict how much water flows into the reactor you end up with air in the reactor after a while. At first I thought it was the Sulfur creating glasses but then I ran several tests without media and I would get the same result. Once I started restricting the output from the reactors the problem was solved. There is a fancy explanation for this but it's too lengthy for me to write up at 8 am![]()
Thanks, that's some great advice. The only other pump I have laying around is a MJ1200 (300gph). Honestly, I think you're right about the reactor fittings being too small to push a lot of flow through this thing. I opened the manifold valve all the way and shut off the recirculating valve so it could not push through the pump and the pellets are barely tumbling. I may scrap this idea using the TLF and either buy a recirculating reactor or see if Matt and I can collaborate on building something that will work. My only other thought with making this work would be to replace the dispersion plate on the bottom with a nozzle.
He's restricting the inlet. Note the array of ball valves on the plenum above the reactor. By doing so he's recirculating inside the reactor but read above for a better way of ding this.
P.S. @ smoothdog: Sorry I'm taking over your thread. I spent countless months on research, prototype building and testing of all kinds of reactors. I'm kind of a expert ha ha.
No need to apologize, your input is greatly appreciated! I just had this reactor sitting around and thought I'd monkey around with it before shelling out for a new one. Do you have any designs you'd be willing to share for a DIY project?

Still not sure how you are regulating the pump from pulling and pushing more on the inlet and outlet rather than recirculating in the chamber... Do you have two ball valves on either end to correct for return pressure?
What Schplitter said.

You want to sell the Marineland maxijet utility pump?
Not sure yet. I may have another use for it.