How long does Flat Worm Exit stay in tank? Can I skip a water change?

[Taiyaki.Visuals]

I have a 40g AIO and noticed some brown guys walking on a rock, I looked them up and they came out to be Acoel Flatworms? I probably never noticed them since I had a 6 line, but I recently took it out due to aggression. So I went ahead and treated the tank with FWE, the first one on normal dosage, and 2nd round with 2x to clear out what's leftover. So now I am curious if I can dose again and skip the water change and just run carbon after? I only see like 1 or 2 on the glass now, probably leftover stragglers.

And how long does FWE stay in the tank? I know if it was a crazy amount of say Red Planaria then it would be wise to water change. Would like some input on this and what others think.

Thanks

 

[vetteguy53081]

Although you can dose again, be sure to siphon the dead flatworm daily as they are capable of releasing toxins

 

[Taiyaki.Visuals]

Although you can dose again, be sure to siphon the dead flatworm daily as they are capable of releasing toxins

I just see like 1 or 2 after the first 2 rounds. So I think I'm safe from any crazy toxins.

 

[vetteguy53081]

I just see like 1 or 2 after the first 2 rounds. So I think I'm safe from any crazy toxins.

Then comes eggs. For the next 14 days also look daily for the presence of eggs

 

[Taiyaki.Visuals]

Then comes eggs. For the next 14 days also look daily for the presence of eggs

Can I go without a waterchange? And just run carbon?

 

[vetteguy53081]

Can I go without a waterchange? And just run carbon?

Alternative- not solution.