So these are what I had.
They were in my 76, I peroxide treated every rock for hair algea, and then rinsed in a double dosed 5 gal bucket with FWE when I switched to my 240. I was flatworm free for about 6 months until my neglect gave them enough nutrients to grow again and quickly got back up to eyesore proportions. Tried blacking out the tank, cutting lights down to 10 percent (from 40-50 percent normal peaks) and my 6 line never touched them.
I quickly scanned this thread (reading first page and then the 5th and 6th) and so no mention of levamisole. Don't beat me up for posting a reef central link, but this is what I used.
http://www.reefcentral.com/forums/showthread.php?t=2027706
It is perfectly outline in the first post, and I will like what pig wormer I actually purchased.
Agrilabs Prohibit Soluble Drench Powder
https://www.amazon.com/dp/B011ONQVJ0/ref=cm_sw_r_cp_apa_i_IcTdCbJDG7PEZ
I took my old algea barn phypoplankton bottle (the one you squeeze to push liquid up into a sort of dosing measuring cup on side) and added 5-7mg (my scale was acting hokey) of powder, and 300 ml of water (shooting for 1 ml per gallon, and a whole bottle for my entire tank.
I turned off my sump, skimmer, and carbon (figuring I'd start in the sump where the highest concentration was because I run a super bright set of regugium lights and I have some gsp down there to act like a canary if it gets too crazy). It's a 70 gallon sump, about 3/4 full so I added 50ml of my solution, and threw an old pump in my outlet chamber pumping back to my inlet side to keep circulation in sump without affecting display. Well they all started floating away and in all honestly almost melting within minutes. I gave the solution about 30 minutes and popped my skimmer back on, man was the res gunk it was making Gross. After about 2 hours, I turned my carbon back on (new batch of carbon, 4 cups spread 2 per reactor in brs dual reactor). I allowed that to run for almost 6 hours before turning my sump return pump back on. Apparently I didnt let it run long enough because they started floating off of my rock work in my display as well. I went ahead and threw a new filter sock on my return to catch what I could. The next day I did a 20 percent water change, and repeated my dose 3 days later, going up to 90ml this time and treating the entire system. I did it again 10 days later and saw no flatworms whatsoever, and have only done my routine 20 percent every 2 week water changes since and not seen one bug. This stuff was the same price as FWE but can treat about 3000 gallons all said and done, and if you read through the 31 pages on RC, the general consensus is this is the same active ingredient as FWE.
KEY TAKEAWAYS
Dose only as much as you need to paralyze the worms, I saw only minor snail agitation with this, and no coral response whatsoever (vs my first FWE treatment which turned my xenia into a raisen for the better part or 3 weeks).
Fresh carbon, and a lot of it.
Treat again even if you don't see worms.
I think what was quoted in the other thread was it will only kill/paralyze live worms, their eggs are not affected. The numbers coming to mind are 7-10 days as eggs, and 3 weeks before they reach reproductive maturity. So a treatment followed by 2 weeks and another treatment should kill them all in 1 goal.
Hope this helps everyone like it did me, feel free to reach out with any questions.
