Having trouble starting the cycling process. Need some help. Setup = 75 gallon freshwater tank, cascade 1000 canister filter , cascade 300 h.o.t. Filter, 200 watt heater. Amon is at 0ppm and ph is around 8 with water temp about 78. substrate is 70 lbs of black sand and crushed coral. Okay so I moved three off my tiger barbs out off another tank and put then in this one. I acclimated them dir like an hour but they don't look like they are doing well. I used stress coat to treat the water and that expensive bio spirA stuff. Any way fish are lethargic, swimming slow and appear to be having trouble maintaining depth. Even they do move they are twitchy abe looked strained. They can't fight the current of thee bubble wall and just float around the tank bouncing off whatever they hit. No appetite or interest in food. Suggestions?