Be sure what you are treating is oodinium, misdiagnosis can do just as much damage as the parasite itself.
While The RP-x has had some success in the hobby, I would not look to it nor malachite green for the eradication of Amyloodinium
. You should also note that increasing the temperature will only increase the frequency in which the parasite can reproduce, not kill it or affect it adversely. Without an effective cure in place, it will only increase the rate in which the fish are infected.
The best treatment in these cases is the tried and true, copper
. You should seriously consider setting up a QT and rounding up the fish. It must be done quickly. Once oodinium has a hold, it can kill very fast. The only other effective treatment I have heard of is Acriflavin
. Either way a QT in this situation is a must.
Any delay will mean certain death to the fish and any "cure" effective on oodinium will also kill the inverts in the main display.
You must also leave the main tank fishless for a minimum of 4-6 weeks after treatment to eliminate the parasite. If any fish are added back too early, it will just start the cycle anew.