So I had been battling Dinos for a few months. Ironically my phosphate/nitrates are sky high, not zero, so I have no idea how they got hold of the tank. Regardless, I went nuclear and used DinoX. I'm only 5 days in and they are 90% gone. My question is, what do I do once they are gone to re-establish a healthy bacteria population to fight them off if they try to take hold again? I plan to do about a 40% water change once they have been completely wiped out. After that, I'm thinking of adding copepods, Microbacter7 or Dr Tims Waste Away. Would some new live sand help? I just want to take the right steps to be ready for any other bad stuff that tries to take hold. I've been doing this far too long to think this is the last bad thing that will happen.