How many days can the Twisted Waters World Change last?

Question

So, I'm on a world where there aren't too much achievement hunters and charlovers, so Lake Equivocolao never got dirty. I'm throwing the necessary 1000 corpses today, and will catch a Shimmer Swimmer tomorrow. I know there is also a 20 hour cooldown to catch another Shimmer Swimmer, but since I'm aiming for the "Biodegradable" Achievement, I would like to know:

Does the Lake remains dirty if 1000 fish are not caught? How long does it remains dirty? Is there a limit of days or it is only based on the number of fishes?

Let's say I'm the only one doing this achievement and fishing Shimmer Swimmers, will I complete this achievement in 50 days (not counting the 20h, but 24h instead) if I keep fishing everyday? Or will I need to keep dumping corpses into the Lake every 2-3 days?

Comments

I've seen the lake remain dirty for about 3 days. So, I think that as long as the necessary amount of fish is not caught, it should remain dirty.

Answer 1

According to the wiki he lake remains dirty until 1000 Shimmer swimers & fishbones are caught.

I've also played in a server with not much achievement hunters and I've seen the lake dirty for almost a week, so it is only possible to complete the achievement in 50 days if you are the only one that is fishing and you got the Shimmer Swimmer in your first 20 catches. 

Answer 2

Antica player here, I would say its x amount of shimmers obtained.

If I put the work of 1k bodies, I get 1 fish because all fish none work for it in antica.

So it is a one day thing there for sure.