What if any parasites can survive with no fish in tank?

[Z06-Hec]

So purchased some fish from live aquaria... smh...
Anyway they came sick, mentioned it to Live aquaria and whatever with them..

Its been a few weeks, almost 2 months, and they didnt make it but instead wiped out all the fish in the tank.

Now I have no fish and plan to keep it like that for some time, just corals and nems, but wanted to ask if there are any parasites that they would've come in with that can still stay in the tank with no fish to host?

just have my inverts left in the tank, and they are all doing fine.
Cleaner shrimp, Emerald crab, bunch of snails and a Sand star.

 

[SlugSnorter]

45 day is usually enough to remove standard stuff, they cannot feed from your inverts. If you’re gonna be fish-less for a year or so the parasites will be long dead