Greetings! I need some opinions on my setup and what I'd like to do. I currently have a 75 gallon tank with an XP4 canister filter which is also running to a 20 gallon tank DIY wet dry filter with bioballs and a UV filter / heater set @ 78 degrees. Recently I added a 55 gallon tank next to it and plumbed the new tank to the 20 gallon sump. So both tanks share a water source / heater / no need to cycle the new 55 gallon. The 55 gallon currently holds a blue gourami who was terrorizing my angels in the 75 gallon. The 75 gallon tank is a community tank with black neons / corys / angelfish / 1 small rainbow fish. So my dilemma is I have an opportunity to get 6 (all 2 to 3 inch) Santarem Discus from a local breeder. In anticipation of this I got (2) Aquaclear 50s, tossed the carbon insert, added an extra biomax insert, and attached them to the 55 gallon, also I have a 250W marineland heater ready for it. The 55 gallon is bare bottom with a DIY sponge filter that has been in the tank for 2 weeks(maybe slightly less than 2 weeks but since i set up the 55 gallon) So the golden question is once i get my discus or slightly before I use the cutoff on the sump filter line, they will no longer share that filter, crank the heater to 84-85. What should I expect from my Aqua clears? Will they have the bacteria to handle my discus? I am very concerned with a mini cycle hitting that tank on top of new discus acclimating. Most websites say add fish slow but that is not an option with these discus, they must be added all at once. Thanks for your opinion!