I received my marine depot order last week and applied it over the weekend.
The liquid was not as thick as kalk or Joes Juice, so it was easier to dispense a smaller amount and it seemed to go a lot farther.
Also once it was applied it stayed put after the circulation pumps were restarted.
It pretty much did an instant kill on smaller ones, but the larger ones lingered for a day or two (with tentacles fully retracted and the foot(?) swollen).
I noticed that if you didn't get full coverage on the oral disk, some of the tentacles would remain extended and it required an additional application.
I'm still waiting to see if more will sprout from the base as can happen with Joes Juice.
So far so good though. If I don't get a bunch of little ones growing back, I'd choose this over Joes Juice.
Btw this is my first post here, although I've been lurking for a while.