Hey everyone I need some help. I had a 75 gal tank that was doing great full of neon tetras and I started adding cardinal tetras and all a sudden all my neons started dying off. I checked with my local shop and they said cardinals are caught in the wild and may carry disease. Long story short I've been treating the tank but if the last handful die off just going to do a reset. Have the turbo start bacteria but is there a good way of flushing the system of the bacteria/fungi? I just wanna get back on the road of my 75 gal of 200 neons and this time neons only. Any help or suggestions are appreciated thoroughly