Hi Timmy. I'm sure more experienced discus keepers could point you in the right direction. I was impressed with Piwowarki's method of injecting pure oxygen into his system which he explains in his website. I think he uses a medical grade oxygen bottle and various bits that are required to deliver oxygen in a controlled manner. Having checked these systems on line I did manage to get few items but they were very expensive. I'm now using a german product called Sochting oxydator on the return chamber of my sump. I've obtained the oxydator (W) which is the one designed for ponds. It is very simple and has no electrical or moving parts. It uses a hydrogen peroxide solution that dissolves into the surrounding water column and results in constant delivery of pure oxygen and activated oxygen. Hydrogen Peroxide would not get into the system only oxygen would. It has given my moving bed biological filter medium a huge boost and increased the redox values of my 1000 litres tank. You can check it on
www.oxydator.de I think there is an English language option.
Tolga