Now as the title suggests I am pretty new to this hobbie but I love my fish a lot and want them to have the best possible home, yes now that i have read more I know I shouldn't have bought the shark but now I want to give it a good home. 65g is too small I know this too but for the next 1 - 2 years it's all I have after that I am thinking of making a 200g tank in a long rectangular type of configuration so he can do "laps" will he be OK for the 2 years or will that already stunt his growth (he's 4 - 5 inches now).
The big immediate question is he has either Ich or Velvet and given the information I have been able to find actually looks like both

Plus does 1 dose of Coppersafe really last 30 days and not need another dose in all of that time... l lastly how do I get it back out after the 30 days, carbon and water changes?
Thanks for reading all of this I know it is a lot of stuff and I really should know most of this but I am a jump in deep end kind of person.